I have problem with my NAS synology, 2 days ago my storage are disconnected from the domain, and since then I am not able to connect it back. When I try connect to the domain I see this error:

![enter image description here](https://i.stack.imgur.com/wwyb4.png)

Below I share output from **tail -f /var/log/messages**

```
Sep 25 08:53:15 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:1024 specify domain name=TEST.LOCAL
Sep 25 08:53:15 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:565 Use ads join
Sep 25 08:53:15 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: WINIGetRealm(454) can't get ads realm
Sep 25 08:53:15 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:580 ads join: use FQDN=BANYAN.LOCAL
Sep 25 08:53:15 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: SYNOWinISearchLDAP(34) net lookup ldap success.
Sep 25 08:53:15 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:591 ads join: get dc ip=192.168.175.9:389
Sep 25 08:53:16 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: get domain workgroup:TEST
Sep 25 08:53:16 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:613 ads join: get domain netbios name=TEST
Sep 25 08:53:17 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_do_krb5login.c:89 kinit success
Sep 25 08:53:19 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:549 check and join failed (-1) (0)
Sep 25 08:53:19 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:549 check and join failed (-1) (1)
Sep 25 08:53:19 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:671 Use rpc join
Sep 25 08:53:19 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: wins_join1.c:681 rpc join: use NetBios name=TEST
Sep 25 08:53:22 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: WININt4Join(732) rpc join failed
Sep 25 08:53:22 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: SYNOWinJoin1(1196), Restore
Sep 25 08:53:22 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: domain.cpp:848 szStatKey:WINICheckAndJoinDomain, szStatValue:join domain fail
Sep 25 08:53:22 STORAGE entry.cgi_SYNO.Core.Directory.Domain[1].set[17639]: domain.cpp:1306 Failed to save domain/workgroup info.

```

Version my NAS is : **DSM 5.0-4493 Update 5**

Please give me some advice how I can fix it.

Regards
Mick