The Archive Manager site is up but users cannot log in (4379135)

Users receive “invalid credentials” or “authentication failed” messages despite correct passwords. This affects all or specific user sets.

• Incorrect login format: on-prem accounts require DOMAIN\Username; cloud (O365) require UPN.
• IIS authentication mode misconfigured for the deployment type.
• AD Connector service is stopped.

RESOLUTION

1. On the Archive Manager server, open Services → ensure Archive Manager Connector Service is Running.
2. Confirm account type and login format:

On-Premises AD → DOMAIN\Username.

Cloud/O365 → user@company.com (UPN).

3. In IIS Manager → select Archive Manager site → Authentication:

On-Prem deployments → Enable Windows Authentication, disable Anonymous and Forms.

O365 deployments → Enable Forms Authentication and Anonymous, disable Windows Authentication.

Test with a known good on-prem and cloud account to verify successful login.