}
		}
		return user, nil
	case madmin.LDAPProvider:
		if globalIAMSys.GetUsersSysType() != LDAPUsersSysType {
			return "", errIAMActionNotAllowed
		}
		res, err := globalIAMSys.LDAPConfig.GetValidatedDNForUsername(user)
		if res == nil {
			err = errNoSuchUser
		}
		if err != nil {
			if validate {
				return "", err
			}
			if !globalIAMSys.LDAPConfig.ParsesAsDN(user) {
				return "", errNoSuchUser
			}

				err = errNoSuchGroup
			} else {
				entityName = foundGroupDN.NormDN
			}
		} else {
			var foundUserDN *xldap.DNSearchResult
			if foundUserDN, err = globalIAMSys.LDAPConfig.GetValidatedDNForUsername(entityName); err != nil {
				iamLogIf(ctx, err)
			} else if foundUserDN == nil {
				err = errNoSuchUser
			} else {
				entityName = foundUserDN.NormDN
			}
		}
		if err != nil {

		err = errServerNotInitialized
		return
	}

	var dn string
	var dnResult *ldap.DNSearchResult
	var isGroup bool
	if r.User != "" {
		dnResult, err = sys.LDAPConfig.GetValidatedDNForUsername(r.User)
		if err != nil {
			iamLogIf(ctx, err)
			return
		}
		if dnResult == nil {
			// dn not found - still attempt to detach if provided user is a DN.

				return wrapSRErr(errNoSuchGroup)
			}
			entityName = foundGroupDN.NormDN
		} else {
			var foundUserDN *xldap.DNSearchResult
			if foundUserDN, err = globalIAMSys.LDAPConfig.GetValidatedDNForUsername(entityName); err != nil {
				iamLogIf(ctx, err)
			} else if foundUserDN == nil {
				return wrapSRErr(errNoSuchUser)
			}
			entityName = foundUserDN.NormDN
		}
		if err != nil {