Unable to sync a multivalue column in Active directory from One Identity manager

Hello Team,

We have created a String type column and marked it as Multi-valued in ADSAccount table as we want to sync the column values in AD "Proxy Address" attribute which is a multi-valued. We are unable to sync the value in AD and neither we are able to recon back the value from AD if we have manually provided for any user.

Please help if we are missing anything. Thanks...