Can not connect a Microsoft custom email

[Jeremy_Rampe]

I am trying to connect a custom email to our JSM portal, and after signing in with the service account I had created for this, It always ends up signing in directly to my personal work email. 

I have been told to log out of SSO, and that is not an option.  Is there any other way around this? 

[Megan Makowiecka]

Have you tried doing this setup in an incognito browser?

You should be asked again to log into the email account and that's where you should be able to authenticate as the service account. Assuming you have the username/password for the account.

[Jeremy_Rampe]

Incognito mode causes the same loop!