Am I missing something, or is it not possible to access subfolders on an Exchange account? It can see the main inbox, plus deleted, junk, sent, etc., but none of my subfolders.
I just got a Note 8 and the sub folders that I use to organize my work emails were nowhere to be found. I went through every setting but no luck. I tried some of the other email apps that were recommended here and at other help sites. In the end, the only one that worked to show my sub folders was the Microsoft Outlook app. No settings to hunt for. It just worked. I was about to return my Note 8 before I found that this app solved my problem. Too bad Samsung can't fix there default app!
Took a minute, but I found out where to sync the subfolders.
Open the native email app and click on the cog (top right) to open Email Settings
Select your email account with the subfolders
Tap the folder icon to the left of the "Inbox"
Click the slider to begin synchronizing your selected subfolder
I'm using a Galaxy S9 and the native email app. I almost switched back to Outlook, but found this.
I hope this helps!