Backup to CIFS Share fails with "Failed to call RPC function 'FcIsExists': The user name or password is incorrect."

KB ID: 1492
Product: Veeam Backup & Replication | 10 | 11
Published: 2012-01-20
Last Modified: 2022-04-26
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Challenge

Backup Job targeting an SMB (CIFS) Repository fails with:
Error: Failed to call RPC function 'FcIsExists': The user name or password is incorrect.  
screenshot of error
When this occurs, attempting to Rescan the repository may fail with a similar error:
rescan warning screent

Cause

The password of the account specified within the Repository settings has changed.

Solution

  1. Edit the Repository
  2. Select the Share tab
  3. Click the Manage accounts link under the account selection drop-down box
  4. Update the credentials used to connect to the SMB share.
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