I have recently added a second domain to our Office 365 account.  I then created an email account tied with that specific domain and applied a license, so then can have Outlook.  I went to the user's Outlook 2013 on their desktop and added the second email account to it.  So, now they have 2 different email's they can use in one Outlook.  Since I have added this, I keep getting a window that says "Microsoft Outlook Found More Than One John Doe".  When this window is closed it comes back within minutes.  When this happens the user is unable to send/receive emails until the window is closed.  I removed the second account from their Outlook, and they now only have one email address, I also removed the second account from our 365 admin portal.  They are still getting the check name window.  I have created and tested this same scenario on my laptop and I do not get that message.  Is this user related or my Exchange Online settings?

Thank You

Hi ,

Thank you for your question.

Did the issue occur all users?

Did you try to create another account to check if the issue persist.

We could disable the automatic name checking to check if the issue persist. As the following snapshot:

If the issue just occur on the specific user, we could rebuild the profile to check if the error occurred.

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim

Jim,

Thank you for the advice.  I have created another account for myself and I do not get the error as the other two users I have setup.  Since it was to specific users I did delete and recreate the profiles.  I have not check to see if Automatic Name Checking was on/off, will try that next and let you know how it works.

Thanks

Mark