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Our SharePoint site was originally setup under a test name (oldname). When brought into production, I added an AAM to extend it to our production name (prodname). About 6 months ago, I added an SSL redirect in IIS which sends all http requests to https. With the addition of the SSL redirect, Outlook/SharePoint calendar syncing stopped working.

In Outlook, users are getting the error 'Task 'SharePoint' reported error (0x0004010F). 'The SharePoint List (Develop - Calendar) cannot be found If the problem continues, contact the SharePoint site admin. HTTP 404. An error occurred connecting to A connection to, an alternate Web address for this SharePoint site, will be attempted'

Task 'SharePoint' reported error (0x80070005): 'You do not have permission to view this SharePoint List (Develop - Calendar). Contact the SharePoint site administrator. HTTP 303.'

My AAMs look like this for mapping collection: ''

Internal URL ------ Zone -------- Public URL for Zone Default Internet Custom

I think I should also have the entry: Custom

but according to what I've read, I can't have duplicate Internal URLs for the collection yet I also must have an entry where the Internal and Public URLs match.

Or perhaps it's not an AAM issue? Any advice would be greatly appreciated! Thanks.

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up vote 2 down vote accepted

You just have to set up the calendar sync with the appropriate web address using HTTPS. The error is telling you it's trying to connect to which isn't the URL you want configured. As a fallback, it is attempting to pull the calendar from, but that's hitting your HTTP Redirect in IIS.

Configure the calendar overlay using and this issue should be resolved.

Also, make sure that all user accounts requesting the calendar have proper permissions on the calendar list.

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Thank you. I'm quite sure this is the solution and I've passed the information on to the user but I haven't heard back yet so find out if it worked. – user4747 Nov 1 '12 at 17:45

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