Exchange Server 2019 articles, fixes and updates - January 2021

This list contains all of the known Microsoft Knowledge Base articles, howtos, fixes, hotfixes, webcasts and updates of Microsoft Exchange Server 2019 that have been released in January 2021. The list is daily updated.

• 4588885 Cumulative Update 8 for Exchange Server 2019 Q4588885 KB4588885 January 26, 2021
• 4583653 September 2020 update to Exchange Hybrid Configuration Wizard Q4583653 KB4583653 January 26, 2021
• 4577438 Autodiscover v2 returns InternalURL not ExternalURLs in other site Q4577438 KB4577438 January 20, 2021
• 4577352 Description of the security update for Microsoft Exchange Server 2019 and 2016: September 8, 2020 Q4577352 KB4577352 January 20, 2021
• 4576652 Updates for Exchange Server 2019 Sizing Calculator version 10.5 Q4576652 KB4576652 January 20, 2021
• 4576651 Can't join Teams meetings from Surface Hub devices after installing Exchange Server 2019 CU5 or Exchange Server 2016 CU16 Q4576651 KB4576651 January 20, 2021
• 4576650 Can't add remote mailbox when setting email forwarding in Exchange Server 2019 or 2016 Hybrid environment Q4576650 KB4576650 January 20, 2021
• 4576649 System.InvalidCastException when you change passwords in Outlook on the web in Exchange Server 2019 and 2016 Q4576649 KB4576649 January 20, 2021
• 4570255 NullReferenceException occurs when you run TestFederationTrust in Exchange Server 2019 and 2016 Q4570255 KB4570255 January 20, 2021
• 4570254 MSExchangeMapiMailboxAppPool causes prolonged 100% CPU in Exchange Server 2019 and 2016 Q4570254 KB4570254 January 20, 2021
• 4570253 CompletedWithErrors without details for mailbox migration batches in Exchange Server 2019 and 2016 Q4570253 KB4570253 January 20, 2021
• 4570252 Intermittent poison messages due to NotInBagPropertyErrorException in Exchange Server 2019 and 2016 Q4570252 KB4570252 January 20, 2021
• 4570251 Inbox rule applying a personal tag doesn't stamp RetentionDate in Exchange Server 2019 and 2016 Q4570251 KB4570251 January 20, 2021
• 4570248 Get-CASMailbox uses wrong LDAP filter for ECPEnabled in Exchange Server 2019 and 2016 Q4570248 KB4570248 January 20, 2021
• 4570247 CSV log of Discovery export fails to properly escape target path field in Exchange Server 2019 and 2016 Q4570247 KB4570247 January 20, 2021
• 4570246 EdgeTransport crashes with Event ID 1000 (exception code 0xc00000fd) in Exchange Server 2019 and 2016 Q4570246 KB4570246 January 20, 2021
• 4570245 ESEUtil /p fails if any long value (LV) is corrupted in Exchange Server 2019 and 2016 Q4570245 KB4570245 January 20, 2021
• 4563416 Can't view Online user free/busy status in Exchange Server 2019 and 2016 Q4563416 KB4563416 January 20, 2021
• 4559446 Changes to Outlook on the web blocked file extensions and MIME types in Exchange Server 2019 and 2016 Q4559446 KB4559446 January 20, 2021
• 4559444 Conversion from HTML to RTF removes non-breaking space in Exchange Server 2019 and 2016 Q4559444 KB4559444 January 20, 2021
• 4559443 Managed Folder Assistant fails with Event ID 9004 NotInBagPropertyErrorException in Exchange Server 2019 and 2016 Q4559443 KB4559443 January 20, 2021
• 4559442 2080 Events caused by empty values in HKLM\SYSTEM\CurrentControlSet\Services\MSExchange ADAccess\Instance0 in Exchange Server 2019 and 2016 Q4559442 KB4559442 January 20, 2021
• 4559441 Foreign language characters set in RejectMessageReasonText of a transport rule aren't shown correctly in Exchange Server 2019 and 2016 Q4559441 KB4559441 January 20, 2021
• 4559440 Export to a PST for an eDiscovery search fails in Exchange Server 2019 and 2016 Q4559440 KB4559440 January 20, 2021
• 4559439 EAS creates failure report if a message with unknown recipients is in Drafts in Exchange Server 2019 and 2016 Q4559439 KB4559439 January 20, 2021
• 4559438 Edge Transport server hangs in Exchange Server 2019 and 2016 Q4559438 KB4559438 January 20, 2021
• 4559437 PR_RECIPIENT_ENTRYID is computed if no email address or type in Exchange Server 2019 and 2016 Q4559437 KB4559437 January 20, 2021
• 4559436 Attachments with properties (like Azure Information Protection labels) don't always match in Exchange Server 2019 and 2016 Q4559436 KB4559436 January 20, 2021
• 4559435 Introduce an OrganizationConfig flag to enable or disable recipient read session in Exchange Server 2019 and 2016 Q4559435 KB4559435 January 20, 2021
• 4556415 Cumulative Update 6 for Exchange Server 2019 Q4556415 KB4556415 January 20, 2021
• 4552472 Exchange Server 2019 Sizing Calculator version 10.4 is available Q4552472 KB4552472 January 20, 2021
• 4549689 HMA EvoSTS certificate rollover causes authentication prompts due to stalled key on worker process spawn (warmup phase) in Exchange Server 2019 and 2016 Q4549689 KB4549689 January 20, 2021
• 4547723 Can't sign in to Office 365 if configuring hybrid with Chrome SameSite Cookie enabled in Exchange Server 2019 and 2016 Q4547723 KB4547723 January 20, 2021
• 4547722 Can’t go from Office 365 to Enterprise in Exchange Server 2019 or 2016 Exchange admin center (EAC) if Chrome SameSite Cookie is enabled Q4547722 KB4547722 January 20, 2021
• 4547721 Exchange Sizing Calculator still supports mail.que database over 2 TB in Exchange Server 2019 Q4547721 KB4547721 January 20, 2021
• 4547720 Partial word searches not working for mailboxes in Outlook online mode in Exchange Server 2019 Q4547720 KB4547720 January 20, 2021
• 4547719 MCDB status is "Offline" and SSDs are not formatted in Exchange Server 2019 Q4547719 KB4547719 January 20, 2021
• 4547715 New created search folder retention policy is changed in Exchange Server 2019 or 2016 Q4547715 KB4547715 January 20, 2021
• 4547714 Can't add remote shared mailbox by using ECP into distribution group in Exchange Server 2019 and 2016 hybrid environment Q4547714 KB4547714 January 20, 2021
• 4547713 IsOnlineMeeting is always false for Teams-only meetings in Exchange Server 2019 and 2016 Q4547713 KB4547713 January 20, 2021
• 4547712 Outlook on the web (OWA) exposes junk operations even if disabled via OwaMailboxPolicy in Exchange Server 2019 and 2016 Q4547712 KB4547712 January 20, 2021
• 4547711 Public folder permissions aren’t applied from Outlook in Exchange Server 2019 or 2016 hybrid environment Q4547711 KB4547711 January 20, 2021
• 4547710 New-MailboxSearch with In-Place Hold enabled replaces all values in msExchUserHoldPolicies if adding a value in Exchange Server 2019 and 2016 Q4547710 KB4547710 January 20, 2021
• 4547709 InternetWebProxyBypassList is ignored by Mailbox Replication service in Exchange Server 2019 and 2016 Q4547709 KB4547709 January 20, 2021
• 4547708 Elevation of privileges possible when Active Directory permissions role is granted in Exchange Server 2019 and 2016 Q4547708 KB4547708 January 20, 2021
• 4547707 Enable piping for Restore-RecoverableItems in Exchange Server 2019 and 2016 Q4547707 KB4547707 January 20, 2021
• 4547706 Birthday isn't correctly synced to iOS native mail app in Exchange Server 2019 and 2016 Q4547706 KB4547706 January 20, 2021
• 4547705 Authentication loop between msft.sts.microsoft.com/adfs and OWA in Exchange Server 2019 and 2016 Q4547705 KB4547705 January 20, 2021
• 4540123 Description of the security update for Microsoft Exchange Server 2019 and 2016: March 10, 2020 Q4540123 KB4540123 January 20, 2021
• 4538303 Exchange 2019 Setup Prerequisite Check fails for .NET 4.8 Framework in CU4 on Windows builds 1909 and 1903 Q4538303 KB4538303 January 20, 2021
• 4537677 Cumulative Update 5 for Exchange Server 2019 Q4537677 KB4537677 January 20, 2021
• 4536987 Description of the security update for Microsoft Exchange Server 2019 and 2016: February 11, 2020 Q4536987 KB4536987 January 20, 2021
• 4536552 Export-ModernPublicFolderStatistics.ps1 is not working in Exchange Server 2019 Q4536552 KB4536552 January 20, 2021
• 4532747 Address list separation is not working for a user without a mailbox in Exchange Server 2019 and 2016 Q4532747 KB4532747 January 20, 2021
• 4532744 System.ArgumentNullException when you use Set-user to assign block legacy auth policy in Exchange Server 2019 Q4532744 KB4532744 January 20, 2021
• 4532190 Autodiscover Event ID 1 after installing Exchange Server 2019 CU3 or Exchange Server 2016 CU14 Q4532190 KB4532190 January 20, 2021
• 4528696 Exchange PowerShell cmdlets take longer time to run in Exchange Server 2019 and 2016 Q4528696 KB4528696 January 20, 2021
• 4528695 Event ID 4009 when using SubjectOrBodyMatchesPatterns on Edge server in Exchange Server 2019 and 2016 Q4528695 KB4528695 January 20, 2021
• 4528694 Can't open .ics file in Outlook on the web in Exchange Server 2019 and 2016 Q4528694 KB4528694 January 20, 2021
• 4528693 Get-CalendarDiagnosticLog is proxied for queries within the same forest in Exchange Server 2019 and 2016 Q4528693 KB4528693 January 20, 2021
• 4528692 "A parameter was specified that isn't valid" error when creating transport rule in Exchange Server 2019 and 2016 Q4528692 KB4528692 January 20, 2021
• 4528690 Can't move or delete folder in Outlook online mode if the destination has a folder with the same name in Exchange Server 2019 and 2016 Q4528690 KB4528690 January 20, 2021
• 4528689 Outlook on the web shows MailTip when recipients equal the large audience size in Exchange Server 2019 and 2016 Q4528689 KB4528689 January 20, 2021
• 4528688 Only one recipient shows when saving draft by using Exchange ActiveSync version 16.0 in Exchange Server 2019 and 2016 Q4528688 KB4528688 January 20, 2021
• 4528687 NotificationClient logs aren't purged and consume lots of disk in Exchange Server 2019 and 2016 Q4528687 KB4528687 January 20, 2021
• 4523519 Set-SendConnector doesn't work for Exchange Server in hybrid scenarios with Edge Server installed Q4523519 KB4523519 January 20, 2021
• 4523171 Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: November 12, 2019 Q4523171 KB4523171 January 20, 2021
• 4522149 Cumulative Update 4 for Exchange Server 2019 Q4522149 KB4522149 January 20, 2021
• 4520319 S/MIME signed reply draft behaves like the first message in conversation in Exchange Server 2019 and 2016 Q4520319 KB4520319 January 20, 2021
• 4515276 Room mailbox accepts a meeting as “Free” if a booking delegate is set in Exchange Server 2019 and 2016 Q4515276 KB4515276 January 20, 2021
• 4515275 Enable Get/Restore-RecoverableItems to work with Purges folder in Exchange Server 2019 and 2016 Q4515275 KB4515275 January 20, 2021
• 4515274 AutodiscoverV2 request returns REST API endpoint not AutoDiscoverV1 endpoint in Exchange Server 2019 and 2016 Q4515274 KB4515274 January 20, 2021
• 4515273 Mailbox auditing fails when you use SHA1Managed in Exchange Server 2019 and 2016 Q4515273 KB4515273 January 20, 2021
• 4515272 Message is blocked in “SMTP Delivery to Mailbox” queue if exchange server is added in groups of a child domain in Exchange Server 2019 and 2016 Q4515272 KB4515272 January 20, 2021
• 4515271 Can’t convert a migrated remote user mailbox to shared in Exchange Server 2019 and 2016 Q4515271 KB4515271 January 20, 2021
• 4515270 SubmissionQueueLengthMonitor shows “System.ArgumentException: Transition timeout…” in Exchange Server 2019 and 2016 Q4515270 KB4515270 January 20, 2021
• 4515269 SentToMemberOf shows every recipient type not distribution groups when you create transport rule in Exchange Server 2019 and 2016 Q4515269 KB4515269 January 20, 2021
• 4515267 NDR occurs when you resend message from alternate journaling mailbox to journaling mailbox in Exchange Server 2019 and 2016 Q4515267 KB4515267 January 20, 2021
• 4515266 Infinite loop in Recurrence.GetNumberOfYearsBetween() with the Japanese calendar in Exchange Server 2019 and 2016 Q4515266 KB4515266 January 20, 2021
• 4515265 Removing In-Place Hold doesn't work for mailboxes in different domains in Exchange Server 2019 and 2016 Q4515265 KB4515265 January 20, 2021
• 4515264 FindPeople request from Skype for Business on Mac fails with "Invalid Shape Specification" in Exchange Server 2019 and 2016 Q4515264 KB4515264 January 20, 2021
• 4515263 Hide the "Validate-MailFlowThroughFrontDoor" command for Exchange Server 2019 and 2016 Q4515263 KB4515263 January 20, 2021
• 4515262 Enable Remove-MobileDevice to delete mobile devices after migrating to Office 365 from Exchange Server 2019 and 2016 Q4515262 KB4515262 January 20, 2021
• 4515261 Can't copy eDiscovery search results for mailboxes with Exchange online archives in Office 365 in Exchange Server 2019 and 2016 Q4515261 KB4515261 January 20, 2021
• 4515257 Hash mismatch is reported for Exchange DLLs in the bin directory of Exchange Server 2019 and 2016 Q4515257 KB4515257 January 20, 2021
• 4514141 Cumulative Update 3 for Exchange Server 2019 Q4514141 KB4514141 January 20, 2021
• 4509408 Description of the security update for Microsoft Exchange Server 2019: July 9, 2019 Q4509408 KB4509408 January 20, 2021
• 4502159 Adding or removing mailbox permission in EAC doesn't address the msExchDelegateListLink attribute in Exchange Server 2019 and 2016 Q4502159 KB4502159 January 20, 2021
• 4502158 SyncFolderItems contains duplicated ReadFlagChange items in Exchange Server 2019 and 2016 Q4502158 KB4502158 January 20, 2021
• 4502157 The Find command not returning the HasAttachments element in Exchange Server 2019 and 2016 Q4502157 KB4502157 January 20, 2021
• 4502156 Audit logs aren’t updated when "-WhatIf" is used as $false in the command in Exchange Server 2019 and 2016 Q4502156 KB4502156 January 20, 2021
• 4502155 "The primary SMTP address must be specified when referencing a mailbox" error when you use impersonation in Exchange Server 2019 and 2016 Q4502155 KB4502155 January 20, 2021
• 4502154 Providing information for administrators when auto forward limit is reached in Exchange Server 2019 and 2016 Q4502154 KB4502154 January 20, 2021
• 4502141 Appointment that’s created by responding to an email message doesn’t show in any Outlook calendar views in Exchange Server 2019 and Exchange Server 2016 Q4502141 KB4502141 January 20, 2021
• 4502140 Can't preview an eDiscovery search when there are multiple domains in Exchange Server 2019 and Exchange Server 2016 Q4502140 KB4502140 January 20, 2021
• 4502136 The response of FETCH (BODYSTRUCTURE) command of IMAP violates RFC 3501 in Exchange Server 2019 and 2016 Q4502136 KB4502136 January 20, 2021
• 4502135 Correct the error message that you receive when installing Exchange Server 2019 in an organization that has Exchange Server 2010 installed Q4502135 KB4502135 January 20, 2021
• 4502134 Can't get all the emails when searching mailbox by using an end date that's different from today in Exchange Server 2019 Q4502134 KB4502134 January 20, 2021
• 4502133 Can't use Outlook on the web to reply a partner email through mutual TLS in Exchange Server 2019 and 2016 Q4502133 KB4502133 January 20, 2021
• 4502132 Can't reply to old emails after migration even though old legacyExchangeDN is set to migrated mailbox in Exchange Server 2019 and 2016 Q4502132 KB4502132 January 20, 2021
• 4502131 "TLS negotiation failed with error UnknownCredentials" error after you update TLSCertificateName on Office 365 send connector in Exchange Server hybrid environment Q4502131 KB4502131 January 20, 2021
• 4488396 Can't search any results in manually added shared mailbox in Outlook in Exchange Server 2019 and 2016 Q4488396 KB4488396 January 20, 2021
• 4488266 Client application doesn't honor EwsAllowList in Exchange Server 2019 and 2016 Q4488266 KB4488266 January 20, 2021
• 4488265 "There are problems with the signature" error occurs for digital signature message if attachment filtering is enabled in Exchange Server 2019 and 2016 Q4488265 KB4488265 January 20, 2021
• 4488258 OAuth authentication is removed when you save MAPI virtual directory settings in EAC in Exchange Server 2019 and 2016 Q4488258 KB4488258 January 20, 2021
• 4602646 Event IDs 1003, 1309 and 4999 are logged after installing Exchange Server 2019 CU8 Q4602646 KB4602646 January 18, 2021
• 4488401 Cumulative Update 2 for Exchange Server 2019 Q4488401 KB4488401 January 15, 2021
• 4593465 Description of the security update for Microsoft Exchange Server 2019 and 2016: December 8, 2020 Q4593465 KB4593465 January 14, 2021
• 4588741 Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: November 10, 2020 Q4588741 KB4588741 January 14, 2021
• 4583545 Make DomainName in Authserver a multivalued parameter in Exchange Server 2019 and 2016 Q4583545 KB4583545 January 14, 2021
• 4583544 Lots of LDAP requests for FE MAPI w3wp lead to DDoS on DCs in Exchange Server 2019 Q4583544 KB4583544 January 14, 2021
• 4583542 Server assisted search in Outlook doesn't return more than 175 items in Exchange Server 2019 Q4583542 KB4583542 January 14, 2021
• 4583539 Non-breaking space is visible in message body in Outlook in Exchange Server 2019 and 2016 Q4583539 KB4583539 January 14, 2021
• 4583538 Microsoft Teams REST calls exceed the default value of maxQueryStringLength in Exchange Server 2019 and 2016 Q4583538 KB4583538 January 14, 2021
• 4583537 Update Korean word breaker in Exchange Server 2019 and 2016 Q4583537 KB4583537 January 14, 2021
• 4583536 Set-MailboxFolderPermission is included in Mail Recipient Creation in Exchange Server 2019 and 2016 Q4583536 KB4583536 January 14, 2021
• 4583535 New-Moverequest, Resume-Moverequest, and Remove-Moverequest not logged in Audit logs in Exchange Server 2019 and 2016 Q4583535 KB4583535 January 14, 2021
• 4583534 Event ID 65535 System.Runtime.Serialization errors in Application log in Exchange Server 2019 or 2016 Q4583534 KB4583534 January 14, 2021
• 4583533 Exchange Server 2019 or 2016 installation fails with error "The user has insufficient access rights" Q4583533 KB4583533 January 14, 2021
• 4583532 ELC MRM archiving fails due to DomainName in AuthServer in Exchange Server 2019 and 2016 Q4583532 KB4583532 January 14, 2021
• 4583531 Design change about inline images will be forced to download but not open in a new tab of OWA in Exchange Server 2019 and 2016 Q4583531 KB4583531 January 14, 2021
• 4581424 Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: October 13, 2020 Q4581424 KB4581424 January 14, 2021
• 4515832 Description of the security update for Microsoft Exchange Server 2019 and Exchange Server 2016: September 10, 2019 Q4515832 KB4515832 January 14, 2021
• 4503027 Description of the security update for Microsoft Exchange Server 2019 and 2016: June 11, 2019 Q4503027 KB4503027 January 14, 2021
• 4487563 Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: April 9, 2019 Q4487563 KB4487563 January 14, 2021
• 4471391 Cumulative Update 1 for Exchange Server 2019 Q4471391 KB4471391 January 14, 2021
• 4471389 Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: January 8, 2019 Q4471389 KB4471389 January 14, 2021
• 4588297 Attachments can’t be downloaded or previewed from Outlook Web App Q4588297 KB4588297 January 13, 2021
• 4571787 Cumulative Update 7 for Exchange Server 2019 Q4571787 KB4571787 January 13, 2021