2.5.5.10 specifically maybe any of the following:
2.5.5.10 is found in the schema for the regarding attribute. This OID is described in the Microsoft Active Directory Technical Specification MSADTS. 2.5.5.10 corresponds with the 1.3.6.1.4.1.1466.115.121.1.40 syntax.[2]
2.5.5.10 is, as far as LDAPWiki can determine, exclusively used in Microsoft Active Directory.