Windows error 1219 appears when I map a second Synology share. How can I reconnect?

Applies to: Windows SMB access to Synology shares; the same Windows session rule also affects other file servers.

Work through these checks

1. Save work and close applications using this NAS. Identify the server name used by each existing mapped drive; do not disconnect unrelated servers or another user’s working sessions.
2. Review the affected mappings and saved Windows credentials. A command prompt’s net use listing can show existing network connections without changing them. Keep the output private because it reveals server and share names.
3. Disconnect the mappings to the affected NAS only when work is closed. Remove only stale credentials for that same NAS in Windows Credential Manager, then reconnect its shares with one intended authorised account.
4. If separate identities are a genuine business requirement, ask the administrator to design a supported solution. Avoid random IP/name aliases: they can create confusing duplicate paths and affect Kerberos or SMB security expectations.

Confirm the result

Both required shares open under the intended account, with the correct access permissions, after signing out and back in if a session refresh was needed.

If you need help

Include these details in your ticket: Windows version, error number, whether multiple NAS usernames are in use and a redacted mapping list.

Updated 261107