Why is Restriction getting ignored? - exchange-server

Question

I want to get the Id of a folder with the given name in the given parent folder using FindFolder EWS SOAP service through Office JavaScript API function Office.context.mailbox.makeEwsRequestAsync. The specified Restriction seems to get ignored.
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<soap:Header>
<t:RequestServerVersion Version="Exchange2013" />
</soap:Header>
<soap:Body>
<m:FindFolder Traversal="Shallow">
<m:FolderShape>
<t:BaseShape>IdOnly</t:BaseShape>
<t:AdditionalProperties>
<t:FieldURI FieldURI="folder:DisplayName" />
</t:AdditionalProperties>
</m:FolderShape>
<t:Restriction>
<t:IsEqualTo>
<t:FieldURI FieldURI="folder:DisplayName" />
<t:FieldURIOrConstant>
<t:Constant Value="xyz" />
</t:FieldURIOrConstant>
</t:IsEqualTo>
</t:Restriction>
<m:ParentFolderIds>
<t:DistinguishedFolderId Id="root" />
</m:ParentFolderIds>
</m:FindFolder>
</soap:Body>
</soap:Envelope>
The request is successful, but instead of receiving at most one Folder in the response, I am getting all the folders in the specified parent folder.
I am calling this code from an Outlook Web Add-In which has ReadWriteMailbox permissions.
Please also note that specified restriction in a FindItem SOAP service call also did not work for me while the request was successful.
Can anybody point me in the right direction, please?

Answer 1

Restriction is from Messages not Types so your request is incorrect (not sure why it doesn't throw an error) but if you use
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<soap:Header>
<t:RequestServerVersion Version="Exchange2013" />
</soap:Header>
<soap:Body>
<m:FindFolder Traversal="Shallow">
<m:FolderShape>
<t:BaseShape>IdOnly</t:BaseShape>
<t:AdditionalProperties>
<t:FieldURI FieldURI="folder:DisplayName" />
</t:AdditionalProperties>
</m:FolderShape>
<m:Restriction>
<t:IsEqualTo>
<t:FieldURI FieldURI="folder:DisplayName" />
<t:FieldURIOrConstant>
<t:Constant Value="xyz" />
</t:FieldURIOrConstant>
</t:IsEqualTo>
</m:Restriction>
<m:ParentFolderIds>
<t:DistinguishedFolderId Id="root" />
</m:ParentFolderIds>
</m:FindFolder>
</soap:Body>
</soap:Envelope>
it should work okay