Forum Discussion
On-Prem Mailbox in Resources Domian with Online Archive in O365
Our setup is we have 2 domains: Domain A (User Domain) & Domain B (Resource Domain including Exchange Hybrid Servers). We also have Office 365 that Sync's with our user domainA and use's the UPN of t...
gbrown135 all I can say is that usually having an on-prem mailbox with an online archive works fine, so it must be to do with your domain set up.
I would have thought that the on-prem mailbox location is irrelevant, when you open Outlook it just finds your archive location from AD and then connects directly to Exchange Online using the users current credentials.