The error occurs when authentication between Outlook and Exchange server fails due to corrupt profile, damaged or inaccessible OST file, synchronization issues, etc. In this guide, we’ve mentioned the reasons behind the error and the solutions to fix the ‘Outlook cannot connect to server’ error.
While we were writing we ran into the question “Why does outlook fail to connect to the Exchange Server?”.
One source stated Summary: Outlook may fail to connect to the Exchange server due to several reasons. The error occurs when authentication between Outlook and Exchange server fails due to corrupt profile, damaged or inaccessible OST file, synchronization issues, etc.
Account corruption : Another reason why you might not be able to connect Outlook to the network is that the account you are using is somehow corrupt or having issues of its own. When this happens, the application will not be able to make use of your account to log into the mail server.
Try connecting another device to the same network. If the device has Outlook, try to launch it and see if it works properly. Try accessing your browser and navigate to the mail’s website and see if you can retrieve your mail from there. If there is an issue there and you are unable to connect, it probably means there is an issue with the servers.
Why can’t I connect to any servers?
Another thing to check before we start technical workarounds is that there is a valid internet connection. If there is an issue with the network or it is not open, you will not be able to connect to any servers whatsoever.
Why can’t I send or receive email?
Out-of-date software and corrupted Outlook profiles are two of the most common issues that can prevent you from sending and receiving email. If you’re an admin with multiple users reporting problems, you also should check for service issues with Office 365.
Moreover, why can’t I send and receive email in Office 365?
If you’re an admin with multiple users reporting problems, you also should check for service issues with Office 365. If your Outlook client software or Windows operating system software is out of date, you might have problems sending and receiving email.