# Exchange REST API Propagation Status - Cascades Tucson

**Date:** 2026-05-07
**Time:** 09:33 AM MST
**Tenant:** Cascades of Tucson (207fa277-e9d8-4eb7-ada1-1064d2221498)

---

## Current Status: PROPAGATION IN PROGRESS

Exchange REST API is still returning HTTP 401 with "invalid_token" error, despite all required permissions and roles being correctly assigned. This is a known Exchange Online propagation delay.

---

## Verification Completed

**[OK] Graph API confirms all assignments are correct:**

1. **Security Investigator SP** (c64ee5c1-a607-46cb-81b8-42de3de98d48)
   - Exchange Administrator directory role: ASSIGNED ✓
   - Office 365 Exchange Online app role: ASSIGNED ✓
   - App role ID: dc890d15-9560-4a4c-9b7f-a736ec74ec40 (full_access_as_app) ✓

2. **Token acquisition:** WORKING ✓
   - investigator-exo tier token: ACQUIRED ✓
   - Scope: https://outlook.office365.com/.default ✓

3. **Exchange REST API access:** HTTP 401 (propagation delay) ⏳

---

## Error Details

**HTTP Response:**
```
HTTP/2 401
WWW-Authenticate: Bearer client_id="ec156f81-f23a-47bd-b16f-9fb2c66420f9",
                  token_types="app_asserted_user_v1 service_asserted_app_v1",
                  authorization_uri="https://login.microsoftonline.com/common/oauth2/authorize",
                  error="invalid_token"
```

**Analysis:**
- Error "invalid_token" indicates Exchange Online hasn't recognized the new permissions yet
- This is NOT a configuration error (all Graph API checks pass)
- Typical propagation time: 15-60 minutes from role assignment
- Role was assigned: ~09:05 AM MST
- Current time: 09:33 AM MST (28 minutes elapsed)

---

## What's Happening

Exchange Online maintains its own permission cache separate from Entra ID (Graph API). When a new service principal is assigned the Exchange Administrator role:

1. **Immediate:** Graph API recognizes the assignment (verified ✓)
2. **Delayed (15-60 min):** Exchange REST API propagates the permission
3. **Common:** First attempts return HTTP 401 until cache refreshes

This is normal behavior for first-time app onboarding to a tenant.

---

## Next Steps

### Option 1: Wait and Retry (Recommended)

**Retry after:** 10:00 AM MST (27 minutes from now)

```bash
# Clear token cache
rm -f /tmp/remediation-tool/207fa277-e9d8-4eb7-ada1-1064d2221498/investigator-exo.jwt

# Get fresh token
TOKEN=$(REMEDIATION_AUTH=secret bash scripts/get-token.sh 207fa277-e9d8-4eb7-ada1-1064d2221498 investigator-exo 2>/dev/null)

# Test Exchange REST API
curl -X POST \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  "https://outlook.office365.com/adminapi/beta/207fa277-e9d8-4eb7-ada1-1064d2221498/InvokeCommand" \
  -d '{"CmdletInput":{"CmdletName":"Get-Mailbox","Parameters":{"Identity":"Britney.Thompson@cascadestucson.com"}}}'
```

If still 401 after 10:00 AM, wait until 10:30 AM and try again.

### Option 2: Manual Portal Verification (If still failing after 1 hour)

If Exchange REST API still returns 401 after 10:30 AM MST:

1. **Check Entra portal:**
   - https://entra.microsoft.com → Roles and administrators → Exchange Administrator
   - Verify "ComputerGuru - Security Investigator" is listed as a member

2. **Check Conditional Access:**
   - Entra → Protection → Conditional Access
   - Look for policies that might block service principal sign-ins
   - Review "Service provider users" exclusions

3. **Check Exchange Online license:**
   - Verify tenant has active Exchange Online licenses
   - Admin center → Billing → Licenses

---

## Blocking Issue

**Britney Thompson litigation hold verification** cannot proceed until Exchange REST API access works.

**HIPAA Compliance Risk:**
Per Howard's 2026-05-06 note, this check must complete before Wave 1 caregiver rollout (§164.308(a)(3)(ii)(C) + §164.316(b)(2) requirement).

**Impact:**
- Cannot verify if litigation hold is enabled
- Cannot check mailbox forwarding rules
- Cannot audit inbox rules or delegate permissions
- All Exchange-based compliance checks blocked

---

## Timeline

| Time | Event |
|------|-------|
| 09:05 AM MST | App onboarding completed, Exchange Administrator role assigned |
| 09:07 AM MST | First test: HTTP 401 (expected) |
| 09:15 AM MST | Second test: HTTP 401 (still propagating) |
| 09:33 AM MST | Third test: HTTP 401 (28 min elapsed, still within normal window) |
| **10:00 AM MST** | **Recommended retry time (55 min elapsed)** |
| **10:30 AM MST** | **Escalation point if still failing (85 min elapsed)** |

---

## Workaround Options (If Urgent)

If litigation hold verification is urgent and cannot wait for propagation:

1. **Manual Exchange Online PowerShell:**
   ```powershell
   Connect-ExchangeOnline -UserPrincipalName admin@cascadestucson.com
   Get-Mailbox -Identity Britney.Thompson@cascadestucson.com |
     Select DisplayName, LitigationHoldEnabled, LitigationHoldDate, InPlaceHolds
   ```

2. **Exchange Admin Center:**
   - https://admin.exchange.microsoft.com
   - Recipients → Mailboxes
   - Search: Britney Thompson
   - Properties → Mailbox features → Litigation hold

3. **Purview Compliance Center:**
   - https://compliance.microsoft.com
   - Data lifecycle management → Retention
   - Check if Britney's mailbox has retention policies applied

---

**Status:** Waiting for Exchange REST API propagation (normal delay).
**Next action:** Retry after 10:00 AM MST.
**Escalation:** If still failing after 10:30 AM MST, investigate manually via portal.
