fix(login): When using slashes in username (indicates an Exchange acc…

…ount or drive account), use LOGIN as the authentication mechanism
postalsys · Jan 17, 2025 · 7ac0036 · 7ac0036
1 parent d190ec8
commit 7ac0036
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/imap-flow.js b/lib/imap-flow.js
@@ -1055,6 +1055,10 @@ class ImapFlow extends EventEmitter {
         this.expectCapabilityUpdate = true;
 
         let loginMethod = (this.options.auth.loginMethod || '').toString().trim().toUpperCase();
+        if (!loginMethod && /\\|\//.test(this.options.auth.user)) {
+            // Special override for MS Exchange when authenticating as some other user or non-email account
+            loginMethod = 'LOGIN';
+        }
 
         if (this.options.auth.accessToken) {
             this.authenticated = await this.run('AUTHENTICATE', this.options.auth.user, { accessToken: this.options.auth.accessToken });