Exchange Server 2019 articles, fixes and updates - letter U

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

• 5001874 "500 Unexpected Error" when trying to create a user mailbox in ECP Q5001874 KB5001874 April 12, 2021
• 5001195 UPN specified when creating mailbox is overwritten automatically causing login failures in Exchange Server 2019 and 2016 Q5001195 KB5001195 March 17, 2021
• 4583537 Update Korean word breaker in Exchange Server 2019 and 2016 Q4583537 KB4583537 January 14, 2021
• 4576652 Updates for Exchange Server 2019 Sizing Calculator version 10.5 Q4576652 KB4576652 October 23, 2020
• 4502865 "User is already being moved‎" error when you move mailboxes from on-premises to Exchange Online in a hybrid deployment Q4502865 KB4502865 May 10, 2019