D Messaging is distributed directly by your organisation. Android will ask you to allow the install once — that's expected.
How to install
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Download the app
Tap Download for Android above. If Chrome warns that “this type of file can harm your device”, tap Download anyway.
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Open the downloaded file
Tap the notification when the download finishes, or open Files → Downloads and tap
d-messaging.apk. -
Allow installs from this source
Android will say “For your security, your phone is not allowed to install unknown apps from this source.”
- Android 8 and newer: tap Settings → switch on Allow from this source → press back.
- Android 7 and older: go to Settings → Security → enable Unknown sources → OK.
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Install
Tap Install. If Google Play Protect shows a warning for an unrecognised app, tap More details → Install anyway.
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Register and wait for approval
Open D Messaging, register with your name and phone number or email. Your request goes to the admin — you'll get a notification as soon as you're approved.
Updating
Download the latest version from this page and install it over the existing app — your chats stay on the server and you stay signed in.
Verify the download (advanced)
SHA-256 checksum of the current APK:
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