Added M365 Single Sign On.

Improved login security to prevent signing in on multiple devices at the same time. Added voicemail push notifications for faster message alerts. Introduced an optional forced-update setting to ensure users are always on the latest app version. Fixed an issue that could cause duplicate images when sending multiple photos. Resolved call merge and audio codec stability issues. Improved reliability of call and missed-call push notifications. Fixed Click-to-Call behavior so cellular calls initiate correctly and consistently. Added adaptive rate control to optimize call quality and performance on iOS devices. Fixed issues where missed calls did not always appear in call history. Resolved problems answering transferred calls. Fixed audio routing issues when switching between Bluetooth and the phone receiver. Corrected notification badge behavior so counts clear properly after viewing. Improved handling of incoming calls to prevent unintended drops or voicemail routing. Fixed duplicate missed-call notifications. Improved contact management by preventing duplicate contacts and fixing add-contact issues. Corrected caller ID display for cross-domain inbound and missed calls. Fixed display issues with Call Center status options. Improved Caller ID accuracy when using cellular calling features. Enhanced overall incoming call handling and stability. Fixed voicemail count display issues for users with large voicemail volumes. Improved Bluetooth call handling and audio reliability. Fixed issues with Siri-initiated messaging. Resolved missed call notifications not appearing after extended device inactivity. Added support for SMS queuing to improve message delivery reliability. Updated the app to support newer iOS versions and improve overall platform compatibility.