Changing MacOutlook's User Agent?

Question

Is it possible to change MacOutlook user agents on OSX? At the moment during performing https connection to the Exchange EWS it announces itself as:

User-Agent: MacOutlook/14.7.1.161129 (Intel Mac OS X 10.9.6)

I would like to change word MacOutlook OR/AND information that I am working on Mac OS X.

Answer 1

Hi Rafi,

I did some research. It seems there is no official article about changing the word MacOutlook of User-Agent in the HTTP header.

If you think this feature is important, please provide your suggestions or feedback via the link below: https://outlook.uservoice.com/forums/293343-outlook-for-mac

Thanks for your understanding.

Regards,

Monique

Answer 2

Hello Corentin,

correct I am trying to spoof the headers.

I thought maybe User Agent string is just in the one of the properties (.plist files) but did not find it yet.

regards,

rafi

Answer 3

I see… You're trying to spoof the server into not knowing you're

connecting from a Mac in essence.

There is currently no way to do that and I seriously doubt MS will be

adding it any time soon.

Corentin

Answer 4

Hi Corentin,

in my case it is more tricky as I don't want to change headers specifically for the email messages but for the HTTP traffic which outlook is performing when connecting to the Exchange server for email download/inquiry.

So called exchange web service:

https://msdn.microsoft.com/en-us/library/office/dd877045(v=exchg.140).aspx

/ews/Exchange.asmx

Host: localhost:8000

From: 127.0.0.1

User-Agent: MacOutlook/14.7.1.161129 (Intel Mac OS X 10.9.6)

Accept: */*

Accept-Language: en

Content-Type: text/xml; charset=utf-8

SOAPAction: "http://schemas.microsoft.com/exchange/services/2006/messages/GetFolder"

Content-Length: 2457

Accept-Encoding: gzip

Connection: Keep-Alive

<?xml version="1.0" encoding="UTF-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"

Answer 5

Yeah, as Monique mentioned, Outlook for Mac doesn’t allow you to change

anything in the headers of the message very unfortunately.

It used to be the case and people were tweaking the headers through

AppleScript to add return receipt requests, etc., but that has been

stripped away awhile back from what I remember.

Corentin