excellent - yes and no
1st of all - lowering MTU on 3000 PCs seems not only unreasonable but mainly against my Customer's desire
2nd - making the workaround seem to have massive impact on Customer perception of Check Point products in general
3rd - I do not believe this is the only option to be frank therefore I wish you've experienced that scenario yourself and didn't look up over the net for solutions?
Please don't get me wrong but I do not believe that the ONLY solution is to lower MTU values on 3000 PCs NICs (especially in corporate environment) - I do understand that this can be done even by GPO but I don't think Customer will be happy with that approach).
Do you guys thing that the main reason of such problems aligns with so called "WebWashers" equals "proxies" ?
I'm nearly confident that the component on my Customer's network responsible for such "poor" handling of Office365 is more or less McAfee product
Neverthanless thanks Marco, I do appreciate your response and effort but I will be looking for multitude of options in order to present some alternative ways to my Customer giving them a time to swallow its consequences for the business and impact on productivity.