https://community.checkpoint.com/t5/Firewall-and-Security-Management/AD-synchronization-with-CheckPoint-stopped-working/m-p/150826#M24527 <P>Hey,&nbsp;</P><P>&nbsp;</P><P>Can you be more specific on what you meant by "<SPAN>synchronization of AD with CheckPoint has stopped working</SPAN>"&nbsp; (screenshot)?</P><P>You no longer get AD groups per machine/user ?</P><P>&nbsp;</P><P>If so, check if for the LDAP objects the SSL Server Fingerprint has changed - see <A href="https://community.checkpoint.com/t5/Management/Find-out-if-fingerprint-has-changed-on-LDAPS-server/td-p/90655" target="_self">here</A>&nbsp;or <A href="https://community.checkpoint.com/t5/Security-Gateways/Microsoft-forces-LDAPS-march-2020-is-Check-Point-aware-of-this/td-p/73328" target="_self">here</A></P><P>&nbsp;</P><P>(the recommendation is to leave that Fingerprint field empty - we did so)</P><P>&nbsp;</P><P>Tnx,</P> Tue, 14 Jun 2022 16:16:00 GMT Sorin_Gogean 2022-06-14T16:16:00Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/AD-synchronization-with-CheckPoint-stopped-working/m-p/150816#M24523 <P>Please tell me, synchronization of AD with CheckPoint has stopped working, while Identity Collector is configured, all checks pass, in which direction can I look to find the cause of the problem?</P> Tue, 14 Jun 2022 14:42:05 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/AD-synchronization-with-CheckPoint-stopped-working/m-p/150816#M24523 Arturxr 2022-06-14T14:42:05Z https://community.checkpoint.com/t5/Firewall-and-Security-Management/AD-synchronization-with-CheckPoint-stopped-working/m-p/150826#M24527 <P>Hey,&nbsp;</P><P>&nbsp;</P><P>Can you be more specific on what you meant by "<SPAN>synchronization of AD with CheckPoint has stopped working</SPAN>"&nbsp; (screenshot)?</P><P>You no longer get AD groups per machine/user ?</P><P>&nbsp;</P><P>If so, check if for the LDAP objects the SSL Server Fingerprint has changed - see <A href="https://community.checkpoint.com/t5/Management/Find-out-if-fingerprint-has-changed-on-LDAPS-server/td-p/90655" target="_self">here</A>&nbsp;or <A href="https://community.checkpoint.com/t5/Security-Gateways/Microsoft-forces-LDAPS-march-2020-is-Check-Point-aware-of-this/td-p/73328" target="_self">here</A></P><P>&nbsp;</P><P>(the recommendation is to leave that Fingerprint field empty - we did so)</P><P>&nbsp;</P><P>Tnx,</P> Tue, 14 Jun 2022 16:16:00 GMT https://community.checkpoint.com/t5/Firewall-and-Security-Management/AD-synchronization-with-CheckPoint-stopped-working/m-p/150826#M24527 Sorin_Gogean 2022-06-14T16:16:00Z