If the Outlook application is not updated to its current version, then you may get this error.
Users who use the Outlook application on their Mac can even come across this particular error as ‘cannot create mailbox’ and even you can get this message as ‘unknown namespace’. In this section, you will be provided with the various reasons behind the occurrence of Error Code 1025 Outlook. Some of the examples of email clients that use IMAP are ‘Gmail’, AOL’ etc.
The IMAP or Internet Message Access Protocol is the mail protocol which can be used for accessing emails within the remote web server from a client that is locally situated.
