Greetings all --
A very baffling problem here. Small business, about 6 computers (2 Macs, 1 Win 10 PC, the rest all Win 7) in MS SBS 2011 environment. Email accounts are all handled by Office 365 through local Office clients. Two PCs have Office 2010 installed.
These two PCs can receive email from a group mailbox ("orders") but they cannot open the email. The Macs and the Win 10 PC (Office 2016) have no problem with the same email, and if I go to the MS web portal, the email opens fine there for the two accounts affected.
That would seem to lay the blame on Outlook 2010, even though other group mailboxes' messages come through with no problem. It seems to be only this address that is the problem.
However, I log into my server (2008 R2 Standard), which also runs Outlook 2010 (the exact same version, in fact) attached to an Office 365 account, and I have no trouble opening this email.
So now I'm wondering if SBS might be the issue? Since moving to the cloud (earlier this year) all Exchange services have been disabled on the server. No problems with mail flow...just this one address.
Both PCs are running Trend Micro AV with no other anti-spam/AV programs.
I'm completely flummoxed.
Thanks for any and all replies.