Microsoft hat am 16.12.2019 das neue Cumulative Update 15 für Exchange Server 2016 herausgebracht.
Dieses Update beseitigt folgende Fehler:

4515256 “The function cannot be performed…” error when you send a message that’s open for a long time in Exchange Server 2016
4528693 Get-CalendarDiagnosticLog is proxied for queries within the same forest in Exchange Server 2016
4523519 Set-SendConnector doesn’t work for Exchange Server in hybrid scenarios with Edge Server installed
4528690 Can’t move or delete folder in Outlook online mode if the destination has a folder with the same name in Exchange Server 2016
4528687 NotificationClient logs aren’t purged and consume lots of disk in Exchange Server 2016
4528689 Outlook on the web shows MailTip when recipients equal the large audience size in Exchange Server 2016
4528688 Only one recipient shows when saving draft by using Exchange ActiveSync version 16.0 in Exchange Server 2016
4528695 Event ID 4009 when using SubjectOrBodyMatchesPatterns on Edge server in Exchange Server 2016
4528694 Can’t open .ics file in Outlook on the web in Exchange Server 2016
4528692 “A parameter was specified that isn’t valid” error when creating transport rule in Exchange Server 2016
4515257 Hash mismatch is reported for Exchange DLLs in the bin directory of Exchange Server 2016
4528696 Exchange PowerShell cmdlets take longer time to run in Exchange Server 2016
4532747 Address list separation not working for a user without a mailbox in Exchange Server 2016
4523171 Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: November 12, 2019

Update Matrix, Voraussetzungen, Security Updates, Powershell, Troubleshooting

https://www.der-windows-papst.de/2019/12/23/exchange-journal-postfach-zur-archivierung/