Azure > App Service > Mobile App > Offline Sync doesn't work on my Android (Xamarin.Forms)
<p>I'm currently struggeling to get Azure > App Service > Mobile App > Offline Sync running.
In my current experiment I'm trying to strictly follow the instruction.</p>

<p>So I did as follows:</p>

<p><strong>Iteration 1</strong></p>

<ul>
<li>Defined an App Service on Azure (with new DB etc.)</li>
<li>Download the Quick Start C# backend VS solution</li>
<li>Download the Quick Start Xamarin.Forms App</li>
<li>Integrate the Xamarin.Forms PCL and Droid projects into the 1st solution</li>
</ul>

<p><strong>=> Test: TodoList App works as expected. Cool!</strong></p>

<p><strong>Iteration 2</strong></p>

<ul>
<li>Added OFFLINE_SYNC_ENABLED to "Conditional compilation symbols" to the project properties</li>
<li>Run the app again on my Nexus 5 (Android 6.0 - API 23)</li>
</ul>

<p><strong>=> Pull async is called... but nothing happens. So my todoItems stored in the Azure DB do not appear.</strong></p>

<p>The only more or less interesting log i found is this line:
<em>02-23 09:39:55.280 I/mono-stdout(25706): Invalid sync operation: The request could not be completed. (Bad Request)</em></p>

<p>I couldn't recognize any traffic via fiddler.</p>

<p><strong>For me it looks like the templates on azure wont work...</strong></p>

<p>Am I doing something wrong? Do you have any suggestions?</p>

<p>Thanks a lot!</p>

<p><strong>Additional facts:</strong></p>

<p>Now I found something interesting in the Log Stream:</p>

<p><a href="https://offlinecheck1.azurewebsites.net/tables/TodoItem" rel="nofollow">https://offlinecheck1.azurewebsites.net/tables/TodoItem</a>?$filter=(__updatedAt ge datetimeoffset'1970-01-01T00:00:00.0000000%2B00:00')&amp;$orderby=__updatedAt&amp;$skip=0&amp;$top=50&amp;__includeDeleted=true&amp;__systemproperties=__updatedAt%2C__version%2C__deleted</p>

<p>This request doesn't work with PostMan eather.</p>

<p>If I manupulate this url by removing "__" before the 2 first ocurrencies of __updatedAt, I receive the for expected records.</p>

<p>Is there something wrong in the component which constructs the url?</p>