We recently migrated from G-suit to O365. Users are complaining about slow response time of O365 on mobile devices and when opening attachments from the web version of outlook. Is there a way of optimizing the performance of O365?
I think Microsoft will need to do a lot to improve the performance.
There is nothing you can do in regards of performance tuning in Office 365, what you can do is the following: (1) Open a support ticket reporting these problems (2) Review your network connectivity to verify that all network parameters are OK in terms of what it's expected to have a good user experience when accessing to Office 365 services