The next example shows a failed synchronization attempt on a MODIFY operation from the source server that could not be synchronized on the destination server. The log displays the LDIFLDIF (LDAP Data Interchange Format) An IETF standard file format for representing LDAP directory content and modifications to directory content. Typically used to import and export LDAP-based directory information.-formatted modification that failed, where the source server added two additional mobilePhone values for an entry. This would cause a schema violation on the destination server because the destination (in this example, PingOne) only allows a single value for mobilePhone.

[17/Nov/2021:15:56:39.294 -0600] category=SYNC severity=SEVERE_WARNING msgID=1893859389 op=6
changeNumber=58 pipe="ds1_to_PingOne_Destination" class="ds1 Users Sync Class"
msg="Detected MODIFY of uid=user.0,ou=People,dc=example,dc=com at ldap://localhost:1389,
but failed to apply this change because: Attribute 'mobilePhone' has 3 values in the entry so
the value cannot be constructed since a single value is required
(id=1893859350 ResourceOperationFailedException.java:126 9.0.0.0-20211117202405.000Z-0bc8a906). 
Details: Source change detail:
dn: uid=user.0,ou=People,dc=example,dc=com
changetype: modify
add: mobile
mobile: +1 111 111 1111
mobile: +1 999 999 9999
-
replace: modifiersName
modifiersName: cn=Directory Manager,cn=Root DNs,cn=config
-
replace: modifyTimestamp
modifyTimestamp: 20211117215425.236Z
-
 Equivalent destination changes:
dn: uid=user.0,ou=People,dc=example,dc=com
changetype: modify
replace: mobilePhone
mobilePhone: +1 164 286 4924
mobilePhone: +1 111 111 1111
mobilePhone: +1 999 999 9999
-
 Full source entry:
dn: uid=user.0,ou=People,dc=example,dc=com
mail: user.0@example.com
initials: AOR
homePhone: +1 295 940 2750
pager: +1 604 109 3407
givenName: Anett
employeeNumber: 0
telephoneNumber: +1 594 307 3495
mobile: +1 164 286 4924
mobile: +1 111 111 1111
mobile: +1 999 999 9999
sn: Rezzik
cn: Anett Rezzik
userPassword: ****
description: This is the description for Anett Rezzik.
street: 22411 Birch Street
st: PA
postalAddress: Anett Rezzik$22411 Birch Street$Rhinelander, PA  98160
uid: user.0
l: Rhinelander
postalCode: 98160
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: inetOrgPerson
Mapped destination entry:
dn: uid=user.0,ou=People,dc=example,dc=com
email: user.0@example.com
mobilePhone: +1 164 286 4924
mobilePhone: +1 111 111 1111
mobilePhone: +1 999 999 9999
name: { "family":"Rezzik", "formatted":"Anett Rezzik", "given":"Anett" }
population: { "name":"Users", "id":"dd24a03b-bde0-463c-ae76-584f5925fe3d" }
primaryPhone: +1 594 307 3495
resourceType: user
username: user.0
"