Hi Everyone,
Hopefully someone has an idea, because im all out.
As stated in the title after installing the KB to secure Mrsproxy, it started failing for us.
We currently cannot move mailboxes from 365 to on premise or vice versa.
Test-MigrationServerAvailability -ExchangeRemoteMove -RemoteServer "server" -Credentials $cred
results in:
Microsoft.Exchange.MailboxReplicationService.MRSRemoteTransientException: The call to https://mail.server.com failed. –> Access is denied.
I have run through our config extensively but cannot find any issue.
– MRSproxy is enabled (disabled and reenabled to be sure)
– test-mrshealth shows no issues
– Service Account checked for proper permissions (Org management, import export)
– IIS EWS auth settings are Windows Auth with negotiate and NTLM. Extended protection is off.
– Exchange server and the service account are not member of Protected Groups (Admincount not 1)
– Firewall both tested and excluded by testing locally with split DNS
– IIS logs show 401 errors
I found a post with some people with exactly the same issue with no traction, so i hope some bright minds here have some ideas. 😄
Source: r/exchangeserver · by /u/Ergwin1