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Solution failed validation

description

We have been using this solution (Show Sharepoint version in office documents) for a long time on our online sharepoint (office 365) but have recently had issues with the values not updating. We have checked and tried de-activating and re-activating the solution however on re-activation we get 'Solution failed validation'.
We have raised this with Microsoft but hoping someone can help here with this.
We think it maybe related to an upgrade of sharepoint online which has stopped the solution file working but not completely sure.
Would be grateful for any help.

comments

pmgeens wrote Sep 30, 2016 at 3:54 PM

We have the same problem but have yet to find the solution.

Microsoft have removed the ability to use these code-based sandbox solutions, as such we need to find a way to deploy the same code via a SharePoint App instead.

If somebody could re-write the source code in JSOM, REST API or CSOM and publish as a SharePoint App that would solve the problem - but I don't know how to do this or who to approach to ask to do this.