Thank you for answer
I got this results with power shell exchange what is problem
why I'm see this error?
Hi,
Because the value of TargetMailboxServer is the FQDN of mailbox server instead of target mailbox.
For your question, please confirm whether mailbox deliver works in OWA.
If so, it indicate that Exchange server works fine, and we might be focus on Outlook client.
If not, please run below command to check mail flow:
Get-MailboxMessageTrackingLog -Sender test1@armin1.local -Recipients test2@armin1.local | FL >D:\MessageTracking.txt
Then check the results in D:\MessageTracking.txt and post here without sensitive information for analysis.