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Dynamics 365 Community / Forums / Microsoft Dynamics CRM (Archived) / Validation of viewstat...
Microsoft Dynamics CRM (Archived)

Validation of viewstate MAC failed

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Posted on by Community Member

I have recently upgraded ADXStudio to 7.0.0.23 and also moved the hosting to Azure as a Web App.  Since then we have been seeing the above error on all form submissions on users that are not authenticated.  I am unsure on how to best fix it.  We have tried to restart the app and this worked, but for only 10 minutes.  Please can anyone advise?

Thanks

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  • Verified answer
    Craig P. Fleming Profile Picture
    Craig P. Fleming 950 on at

    Hi Steve, a bug was introduced in a recent v7 version related to output caching for anonymous users. We have implemented a work around for our own site, I'll dig up the details with my team and share them here.

    EDIT: Here is a link to a blog post that describes the bug and outlines the code changes required for the workaround. https://www.adoxio.com/blogs/team/2017-04-03-workaround-fix-for-validation-of-viewstate-mac-failed/

  • Community Member Profile Picture
    Community Member on at

    Thank you Craig!  I'll have a read and try this out!!!

  • Suggested answer
    Community Member Profile Picture
    Community Member on at

    Hello again, I'm marking this as the suggested answer.  Testing has confirmed the fix.

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