2298542 - 501 Internal Server Error When you add Attachments to Activity Using Batch ODATA Call

You are trying to add Attachments to Activity using batch ODATA calls, After sending the ODATA,

You are receiving 501 server error.

For Example the payload is as below,

--change_01
Content-Type: application/http
Content-Transfer-Encoding: binary

POST ActivityAttachmentFolderCollection HTTP/1.1
Content-Type: application/json
Accept: application/json
Content-ID: 1
Content-Length: 10000

{
    "ParentObjectID" : "00163e08b8c81ee5bca93c9002632911",
    "CategoryCode" : "2",
    "MimeType" : "text/plain",
    "TypeCode" : "10001",
    "Name" : "ODATA01N2",
    "Binary" : "dGhpcyBpcyBhIHRlc3Q="
}

As in above example, the ParentObjectID is 00163e08b8c81ee5bca93c9002632911 but this is not the correct way. The ParentObjectID should be 00163E08B8C81EE5BCA93C9002632911.

Which means all the characters should be uppercase.

Maintain the ParentObjectID in uppercase and try the POST function again.

KBA , LOD-CRM-INT-API , OData API (C4C Only) , How To