openspecs/oxorule: specify that ReplyTemplateGUID can be 0

[jengelh]

Pursuant to #3835 , I ask that MS-OXORULE be updated. (cc @lindalu-MSFT )

In the section https://learn.microsoft.com/en-us/openspecs/exchange_server_protocols/ms-oxorule/d5c14d2f-3557-4b78-acfe-d949ef325792 , replace:

ReplyTemplateGUID (16 bytes): A GUID that is generated by the client in the process of creating a reply template. The value of the ReplyTemplateGUID field is equal to the value of the PidTagReplyTemplateId property (section 2.2.9.2) that is set on the reply template.

by

ReplyTemplateGUID (16 bytes): A GUID that is generated by the client in the process of creating a reply template. The value of the ReplyTemplateGUID field is equal to the value of the PidTagReplyTemplateId property (section 2.2.9.2) that is set on the reply template. If the reply template message has no PidTagReplyTemplateId property (this is how Outlook 2021 creates them), GUID_NULL is used for ReplyTemplateGUID.

Rationale:

Outlook 2021 (v2310 Build 16924.20150 C2R) generates the reply template message without any PidTagReplyTemplateId property. When such a template is used, Outlook sets a rule's ReplyTemplteGuid to {00000000-0000-0000-0000-000000000000} (also known as GUID_NULL in the Windows C API).

[lindalu-MSFT]

Hi @jengelh I need to add the permission block to this org to be able to READ-WRITE. This might take a while to figure out! THanks, LInda