Do you have any other McAfee product installed on the box ?
Can you please share the browser detail in which issue reproducible?
Is this reproducible in other browser as well ?
Can you please perform following steps to see if SAE is the root cause of it.
Test 1 :
1. Add OWA URL in allow list on SAE ePO policy
2. Enforce policy on client and see if it resolves issue
Test 2 : ( if issue still reproducible after test #1 )
1. On ePO policy disable both browser and non browser based email policy.
2. Enforce policy on client
3. Now validate the issue
if both #1 and #2 doesn't resolved issue then I need memory for dump of process taken during freeze to investigate it further.