What is a connected account in Outlook.com? When you add a Connected Account in your Outlook.com account, it is similar to adding an email account to Gmail for POP3 and SMTP.

Microsoft is working to resolve an Exchange Online issue causing email access problems for Outlook mobile users who use ...

"IMAP syncs with Microsoft servers experiencing failures that are causing Gmail sync issues. We currently believe the issue only affects users syncing their email from Outlook servers." Google said.