Hi Climbguy3 and Sean,
I’d appreciate your information.
Based on your information, I understand that your Office 365 services are working fine and the Autodiscover settings are set up correctly.
I would like to confirm the following information.
Does the problematic devices are using the same network environment? If yes, please use another network environment to see whether this issue persists.
Moreover, please update the Outlook to the latest version.
@Climbguy3, To help you resolve the Outlook 2011 issue, Microsoft provides a specific support channel to help customer resolve this kind of issue. I suggest you also create new posts in the Outlook 2011 forum to get a better answer.
@Sean, do you mean this issue only occur to your mobile device?
Regards,
Jerry Cen