How do I fix Gmail error 78754?

How to resolve the 'Error 78754: Failure'

1. Re-verify your Gmail log-in details.
2. Turn on IMAP and Allow less secure apps associated with your Gmail account.
3. Check your Microsoft Outlook and configure appropriately.
4. Verify if 2-step verification is enabled, then generate an app-specific password.

How do I configure Outlook for Gmail IMAP?

Configure Outlook for use with G Suite (formerly Google Apps)

1. Log in to Gmail.
2. Click the gear in the top right.
3. Click Settings.
4. Click the Forwarding and POP/IMAP tab.
5. In the IMAP Access section, select Enable IMAP.
6. Click Save Changes.
7. Go to www.google.com/settings/security/lesssecureapps.

How do I stop Gmail from blocking in Outlook?

Under “Change account access for less secure apps”, click the link to the “Less secure apps” to open your Gmail account access settings. On this page, simply select “Turn on” from the two options. Your account will automatically be updated, so you can simply close the window afterwards.

How do I enable IMAP in Gmail?

Step 1: Check that IMAP is turned on

1. On your computer, open Gmail.
2. In the top right, click Settings .
3. Click Settings.
4. Click the Forwarding and POP/IMAP tab.
5. In the "IMAP access" section, select Enable IMAP.
6. Click Save Changes.