Unable to add permissions or Unable to add any identity source in vCenter 6.x

ssoAdminserver logs

[INFO ][2019-12-19T14:50:25.432Z][k4cu9c27-323-auto-91-h5:70000118] auditlogger - {"user":"Administrator@VSPHERE.LOCAL","client":"","timestamp":"12/19/2019 14:50:25 UTC","description":"Registering the Active Directory as identity source

with domain Name 'LAB.LOCAL'","eventSeverity":"INFO","type":"com.vmware.sso.IdentitySourceManagement"}

[INFO ][2019-12-19T14:50:25.432Z][k4cu9c27-323-auto-91-h5:70000118] IdentitySourceManagementServiceImpl - [User {Name: Administrator, Domain: VSPHERE.LOCAL} with role 'Administrator'] Registering the Active Directory as identity source w

ith domain Name 'LAB.LOCAL'

[INFO ][2019-12-19T14:50:25.488Z][k4cu9c27-323-auto-91-h5:70000118] PooledLdapConnectionFactory - New connection created in pool PooledLdapConnectionIdentity [tenantName=null, username=vcsalab.org@vsphere.local, authType=SRP, us

eGCPort=false, connectionString=ldap://localhost:389]

[WARN ][2019-12-19T14:50:25.551Z][k4cu9c27-323-auto-91-h5:70000118] LdapErrorChecker - Error received by LDAP client: com.vmware.identity.interop.ldap.OpenLdapClientLibrary, error code: 1

[ERROR][2019-12-19T14:50:25.556Z][k4cu9c27-323-auto-91-h5:70000118] IdentityManager - Failed to add identity provider for tenant [vsphere.local]

[ERROR][2019-12-19T14:50:25.556Z][k4cu9c27-323-auto-91-h5:70000118] ServerUtils - Exception 'com.vmware.identity.interop.ldap.OperationsErrorLdapException: Operations error LDAP error [code: 1]'

vmdird syslog

2019-12-18T10:59:17.368888+00:00 err vmdird  t@140252710672128: UpdateServerObject: InternalModifyEntry failed. Error code: 1, Error string: Schema check failed - (9612)(Objectclass (vmwDirServer) is not defined in schema)

2019-12-18T10:59:48.033055+00:00 err vmdird  t@140252710672128: UpdateServerObject: InternalModifyEntry failed. Error code: 1, Error string: Schema check failed - (9612)(Objectclass (vmwDirServer) is not defined in schema)

019-12-19T15:09:08.088685+00:00 err vmdird  t@140036292978432: CoreLogicModifyEntry failed, DN = CN=81FD31A929956E9A1AEC546701B114C6EC48E74A,CN=Certificate-Authorities,cn=Configuration,dc=vsphere,dc=local, (9612)(Schema check failed - (9612)(Objectclass (vmwCertificationAuthority) is not defined in schema))

2019-12-19T15:09:08.089737+00:00 err vmdird  t@140036292978432: VmDirSendLdapResult: Request (Modify), Error (1), Message (Schema check failed - (9612)(Objectclass (vmwCertificationAuthority) is not defined in schema)), (0) socket (127.0.0.1)

(END)

Resolution :

Appliance Based Platform Services Controller:

• Ensure to take a snapshot or Backup of the VCSA and PSC 
• Connect to the Platform Services Controller with an SSH session as root.
• Stop the Platform Services Controller services 
• Run this command to update the VMdir Schema:
• /usr/lib/vmware-vmdir/sbin/vmdird -c -u -f /usr/lib/vmware-vmdir/share/config/vmdirschema.ldif
• Start the Platform Services Controller services 
• Re-add the identity source 

Windows Based Platform Services Controller:

• Log in to the Platform Services Controller machine as an Administrator.
• Open an administrative command prompt.
• Change to the Platform Services Controller installation directory:
• cd C:\Program Files\VMware\vCenter Server\bin
• Note: This is the default installation path. If you have installed the Platform Services controller to another location, modify this command to reflect the correct install location. 
•  stop all services: 
• Run this command to update the VMdir Schema:
• C:\Program Files\VMware\vCenter Server\vmdird\vmdird.exe -c -u -f C:\ProgramData\VMware\vCenterServer\cfg\vmdird\vmdirschema.ldif
• Note: This command uses the default installation path. If you have installed the Platform Services controller to another location, modify this command to reflect the correct install location. 
• start all services and re-add the identity source 

Below is a different KB but you can use it as a reference to update the schema.ldif file 

https://kb.vmware.com/s/article/2144612      -à Deploying or Installing an additional Platform Service Controller 6.0 Update 1b fails during vmafd firstboot (2144612)