Zimbra external account Gmail

"Error: Invalid credentials", while adding Gmail as an External account

   KB 24127        Last updated on 2021-11-4  




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Problem

Error: Invalid credentials, while adding Gmail account as an external account (POP3/IMAP) in Zimbra.

Solution

By default google will not allow to configure Gmail in other applications so, less secure apps should be allowed in Gmail.
Once less secure apps allowed, POP/IMAP should be enabled in Gmail to configure Gmail account in Zimbra.
Note: Zimbra, configured external account takes storage from users assigned quota.

Step-1: Allow less secure apps in Gmail

Login Gmail account --> click on profile image --> Manage your google account --> Security --> Less secure apps --> Turn on access

Google-less-secure-apps-1.png
Google-less-secure-apps-2.png

  • Make sure POP3/IMAP enabled in Gmail
To enable POP3
Login Gmail account --> Settings (Gear icon on top right) --> See all settings --> Forwarding and POP/IMAP --> enable POP for all mail / Enable POP for mail that arrives from now on
To enable IMAP
Login Gmail account --> Settings (Gear icon on top right) --> See all settings --> Forwarding and POP/IMAP --> enable IMAP


Submitted by: Raghu Noti
Verified Against: ZCS 8.8.x, ZCS 9.0 Date Created: 2020-07-28
Article ID: https://wiki.zimbra.com/index.php?title=Zimbra_external_account_Gmail Date Modified: 2021-11-04



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