diff --git a/admin-guide/troubleshooting/sssd.md b/admin-guide/troubleshooting/sssd.md
index 881c5815..11ab9ca7 100644
--- a/admin-guide/troubleshooting/sssd.md
+++ b/admin-guide/troubleshooting/sssd.md
@@ -58,6 +58,34 @@ PAM Environment:
 #
 ```
 
+## Check Log for AD connection
+
+If `/var/log/sssd/sssd_D.PSI.CH.log` complains about file issues like
+
+```
+  *  (2024-10-03  9:47:17): [be[D.PSI.CH]] [sysdb_delete_cache_entry] (0x0020): [RID#78] LDB Error: No such object (32); error message: [ldb_wait from ldb_delete with LDB_WAIT_ALL: No such object (32)]
+********************** BACKTRACE DUMP ENDS HERE *********************************
+
+(2024-10-03  9:47:17): [be[D.PSI.CH]] [sysdb_delete_entry] (0x0040): [RID#78] sysdb_delete_cache_entry failed: 2
+(2024-10-03  9:48:24): [be[D.PSI.CH]] [sysdb_create_ts_entry] (0x0040): [RID#90] ldb_add failed: [Entry already exists](68)[Entry name=X06SA@d.psi.ch,cn=groups,cn=D.PSI.CH,cn=sysdb already exists]
+   *  ... skipping repetitive backtrace ...
+(2024-10-03  9:48:24): [be[D.PSI.CH]] [sysdb_create_ts_entry] (0x0040): [RID#90] Error: 17 (File exists)
+   *  ... skipping repetitive backtrace ...
+(2024-10-03  9:48:24): [be[D.PSI.CH]] [sysdb_create_ts_entry] (0x0040): [RID#90] ldb_add failed: [Entry already exists](68)[Entry name=gac-x07da@d.psi.ch,cn=groups,cn=D.PSI.CH,cn=sysdb already exists]
+   *  ... skipping repetitive backtrace ...
+(2024-10-03  9:48:24): [be[D.PSI.CH]] [sysdb_create_ts_entry] (0x0040): [RID#90] Error: 17 (File exists)
+   *  ... skipping repetitive backtrace ...
+(2024-10-03  9:48:24): [be[D.PSI.CH]] [sysdb_create_ts_entry] (0x0040): [RID#90] ldb_add failed: [Entry already exists](68)[Entry name=X07DA@d.psi.ch,cn=groups,cn=D.PSI.CH,cn=sysdb already exists]
+```
+
+delete the `sssd` files:
+
+```
+systemctl stop sssd.service
+rm -f /var/lib/sss/db/*
+systemctl start sssd.service
+```
+
 ## Extended Logging
 
 To get more logging messages you may raise the log level to 6, either permanently in Hiera with key `aaa::sssd_debuglevel` or temporary on the host itself with