Configuring Nextcloud

1. Point your browser at https://example.org and set username and password for your admin user
2. Go to the settings menu (cogwheel at the top right) → "Apps" → "Social & communication" and enable "JavaScript XMPP Client"
3. cogwheel → "Admin" → "JavaScript XMPP Client"

• Select "External" XMPP server
• Enter example.org in the "XMPP Domain" field
• Enter https://example.org/http-bind/ in the "BOSH URL" field
• "Save settings" at the bottom
• Keep this page open, you will need its "External authentication" information for the next step

Next: Adding authentication to either Prosody or ejabberd