Two way Sync between SharePoint online and SharePoint 2019 document libraries

Question

We have 2 SharePoint environments; SharePoint online and SharePoint on-prem 2019. Each environment contain 40 libraries. and we want to sync the 2 environments, so if a files got added,edited or deleted from on-prem it should get sync in the online and the other way (from on-line to onprem). we can do this in scheduled basis.

So is there any available power shell scripts or c# code which we can use to accomplish this task?
Thanks

Answer 1

Hi @john john ,
According to my research, there is no way to do this directly.
But there are 2 workarounds for your reference:

1. Use Hybrid Search
   With Hybrid Search, users in both environments can search and see all documents without having to synchronize, and they can know if a document has been created, modified, or deleted.
   
   For more information, please refer to this article.
2. Use OD4B
   Both SharePoint Online and SharePoint 2019 support OD4B, and manual synchronization can be performed with the help of OD4B as a tool.
   For more information, please refer to this article.

Thanks,
Yanli Jiang

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