Check the server configuration for this service. For example, check the capabilities that the server supports. You can use ...

Check the server configuration for this service. For example, check the capabilities that the server supports.
 You can use the following commands to enable login with plain text.
For IMAP:[Set-ImapSettings -LoginType:PlainTextLogin] 
For POP:[Set-PopSettings -LoginType:PlainTextLogin]
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