An integrated threat protection solution designed to detect, investigate, and respond to cyber threats across Microsoft 365 services.
Hello Terri,
Thank your reaching out I’m here to help you with your issue about receiving the emails to your Microsoft 365 which is taking 15 minutes. I first suggest to check Work Offline mode is disable to your outlook. Open outlook and go to Send/ receive tab, be sure Work Offline is not highlighted. Now press F9 in Outlook or select Send/ receive tab All Folders check if there is any new email that suddenly appears.
Next lets clear and rebuild the Outlook sync close Outlook and navigate to: %localappdata%\Microsoft\Outlook\ locate your ost.file rename it to backup.ost then reopen Outlook.
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo