We have emails on an Exchange server, which is not hosted by Microsoft. For the sake of discussion, emails like *** Email address is removed for privacy ***
We also have Office 365 accounts that use the same *** Email address is removed for privacy *** as logins.
This has been working fine for a long time, nothing has changed recently on either the Office accounts or the exchange host.
Two of my coworkers now have problems with their local installs of Outlook. Nothing is wrong with the exchange host (and everything works fine on their phones and on a test setup on a different computer).
Instead of connecting to our exchange server, Outlook now connects to their Office 365 accounts.
For example, one of them sent me two emails on Monday, which did not deliver to my exchange inbox, instead I can see them if I log in to Office.com and go to the web version of Outlook. They're the only things in that webpage, it's not a clone of my non-microsoft exchange inbox.
When I look at the File menu on Outlook on those two machines the "Access this account on the web" link is pointing to Outlook.Office365.com. On my own computer it properly points to our exchange host.
I've tried deleting and re-adding the email accounts in Outlook, using autodiscover to find the info for the exchange host. They just revert back to trying to use Office.
Both of those users recently stated using Skype for Business through their Office 365 accounts, but that was a few weeks ago and the email issues started only two days ago, and people who also recently stated up Skype have no similar outlook problems, so it seems particular to these two installs. I just mention it if it's relevant, maybe some feature like right-clicking on Skype and initiating an email from there broke this?
What told Outlook to start using the office365 servers instead of the non-microsoft exchange account? and how do I undo this?