This article explains how to fix an issue that may occur when changing LDAP settings in Strategy 9.x - 2020.
SYMPTOM:
When trying to change any LDAP setting via Strategy Developer (for example Host name) the following error message is seen:

Object with ID 'xxxxxxxxxxxx' and type 37 (Request) is not found in the metadata. it may have been deleted. Failed to delete schedule for trigger 'xxxxxxxxxxxx'.