we use office365 Exchange Online for our helpdesk email account.
WHMCS helpdesk retrieves these mails via pop3 authenication.
Microsoft has announced the retirement of Basic Authentication for EWS, EAS, IMAP, POP and RPS to access Exchange Online.
Beginning October 13, 2020, we will retire Basic Authentication for EWS, EAS, IMAP, POP and RPS to access Exchange Online. Note: this change does not impact SMTP AUTH. There are several actions that you and/or your users can take to avoid service disruptions on client applications, and we describe them below. If no action is taken, client applications using Basic Authentication for EWS will be retired on October 13, 2020. Any application using OAuth 2.0 to connect to these protocols, will continue to work without change or interruption.
Please implement OAuth 2.0 in WHMCS to access these mailboxes after October 13, 2020
WHMCS Team Clarification:
We will be implementing a different protocol other than POP, one that was designed to utilize Azure Oauth App credentials. The Microsoft Graph API allows for mail transport and supports modern authentication. There will be a specific Microsoft option in WHMCS support department setup (for email retrieving, ie, an alternative to traditional POP options), as well as a Microsoft option for mail sending (in General Settings; an alternative to traditional SMTP options).
Featured Comment
Version 8.6 has now reached public beta, which includes OAuth2 Support for Microsoft Email Services, for both sending and importing: https://blog.whmcs.com/133721/whmcs-86-beta-now-available
Please join us during the pre-release testing period and provide your feedback in our dedicated beta community board: https://whmcs.community/forum/590-whmcs-86-beta-discussion/