By default Outlook for Android gets the emails immediately when they are received (push).
Is there a way to set the sync frequency either individually for each email account or at least globally ?
If it matters, my email accounts are all Exchange ones.
On the stock email app (Samsung) it is possible to choose the sync frequency and even set manual syncing, but I can't find any similar option in Outlook for Android.
Unfortunately, it is not possible to change the frequency of emails sync using Outlook for Android (see the thread Set sync frequency and quiet times on outlook app).
From the link above:
There are no such settings in the Outlook or OWA apps from the play store
Outlook for Android users have requested the feature on Uservoice. However, it has not been yet implemented (as of Nov. 2018).
If you are using an another app to check your Exchange emails (I use the Gmail app) then it is possible to change the sync frequency.
Q & A