At a glance
- Install Outlook (not generic “Mail” app) for the best Microsoft 365 experience.
- Sign in with work account — not Personal Hotmail unless that is your license.
- Enable MFA on phone when prompted.
- Separate work profile on Android where possible.
Who this guide is for
Employees who need company email and calendar on iPhone, iPad, or Android after migration to Microsoft 365.
Before you start
- You need a assigned license (Business Basic or higher).
- Know your email (
name@company.com) and temporary password from IT. - Complete MFA registration if your company requires it.
iPhone / iPad — recommended steps
- Install Microsoft Outlook from the App Store.
- Open → Add account → Microsoft 365.
- Enter work email → sign in → approve MFA on screen.
- Allow notifications for mail and calendar.
- Open Settings → Mail → Contacts and enable Outlook contacts if you use company directory.
Built-in Apple Mail: Works with Exchange ActiveSync but Outlook gives better Teams integration and focused inbox controls.
Android — recommended steps
- Install Microsoft Outlook from Google Play.
- Add account → work email → sign in.
- If your company uses Intune, install Company Portal when prompted and enroll device.
- Use Work profile separation if IT requires it (Business Premium policies).
Step-by-step first sign-in
- Enter email address.
- Redirect to Microsoft sign-in page (company branding may appear).
- Enter password → Update password if first login.
- Register MFA (Authenticator app).
- Wait for mailbox sync (large mailboxes take longer on first sync).
What should work after setup
| Feature | Expected |
|---|---|
| Send/receive mail | Yes |
| Calendar invites | Yes |
| Teams chat in Outlook mobile | Yes (newer versions) |
| Full desktop Office editing | Use Word/Excel apps separately |
Troubleshooting
| Problem | Fix |
|---|---|
| “Account not found” | Typo in email; license not assigned |
| Repeated password prompts | Confirm MFA; remove old account and re-add |
| Mail sync stuck | Check Wi‑Fi; restart app; verify license active |
| Cannot open attachments | Install Office mobile apps; check storage |
| Admin blocked device | Enroll in Company Portal or ask IT |
If the whole company lost mail, see license expired guide.
Security tips for mobile
- Use device PIN or biometrics.
- Do not forward work mail to personal Gmail.
- Report lost phones to IT immediately — remote wipe via Intune on Premium/E3.
Summary
Use the Outlook app, sign in with your Microsoft 365 work account, complete MFA, and contact IT if enrollment apps are required. Mobile setup is quick when licenses and DNS are already correct.