Azure Management REST API - "Authentication failed. The 'Authorization' header is provided in an invalid format."
<p>I am desperately trying to move 2 classic storage accounts from my old MSDN subscription to my MPN subscription and I keep hitting a brick wall as move is only supported for these through REST APIs.</p>

<p>I have enabled the APIs following the instructions here....</p>

<p><a href="https://azure.microsoft.com/en-us/documentation/articles/resource-group-move-resources/" rel="noreferrer">https://azure.microsoft.com/en-us/documentation/articles/resource-group-move-resources/</a></p>

<p>and here...</p>

<p><a href="https://msdn.microsoft.com/en-us/library/azure/dn776326.aspx" rel="noreferrer">https://msdn.microsoft.com/en-us/library/azure/dn776326.aspx</a></p>

<p>but am completely flummoxed. I have created a POST request as suggested to check status as the first call in the 'move resources' instructions...</p>

<p>POST <a href="https://management.azure.com/subscriptions/" rel="noreferrer">https://management.azure.com/subscriptions/</a>{subscriptionId}/providers/Microsoft.ClassicCompute/validateSubscriptionMoveAvailability</p>

<p>(with the subscriptionId replaced with the ID for each) and passing the appropriate source / target body in.</p>

<p>I have also provided the Authorization header as follows...</p>

<p>Authorization: {key as generated by the Azure portal}</p>

<p>Completely lost now. I have tried using both Fiddler &amp; Postman. PowerShell isn't an option for me because I don't know it at all. I just want to move 2 items over and so far just having these management APIs running has cost me over £15 and my website is on the verge of going down as my credit will soon expire.</p>

<p>Any help would be most appreciated.</p>