So, no need to panic rather you should go for possible assumptions based on the potential reasons behind the issue which we are going to discuss next. With connectivity issues, users may get some other error messages as well like issues in the new account profile. It never let users complete the configuration rather stuck the process in between. These are basically connectivity issues in Outlook while configuring Office 365 or Exchange Online account to it. With connectivity issues, users may get some other error messages as well. Outlook message “Trying to connect…” or “Disconnected”.Some of the errors due to such issues are – Sometimes, even after a successful connection at the beginning, users may face connectivity issues between the Outlook application and Office 365/Exchange Online. MS Outlook application can be configured with Office 365 account or other Exchange-based accounts to access the data in mailboxes.