ST-2026-223 · SDKs & toolchains
Microsoft is retiring Teams Developer Portal app-manifest environment variables
Microsoft announced that the Teams Developer Portal environment-variables feature for app manifests will retire on 31 August 2026, after which manifests that reference those variables become invalid and developers can no longer create, manage or access the variables in Developer Portal.
Previous state
Teams developers could use Developer Portal environment variables inside app manifests to manage environment-specific values.
Current state
Microsoft will retire the Developer Portal app-manifest environment-variables feature on 31 August 2026; manifests that reference those variables become invalid and the variables can no longer be created, managed or accessed through Developer Portal.
Affected users
Who needs to care
Microsoft Teams developers and app teams whose Teams app manifests reference Developer Portal environment variables.
Required response
What to do
Replace manifest environment-variable dependencies before 31 August 2026 and use separate app registrations or manifests for each required environment as directed by Microsoft.
Evidence boundary
What the source does not prove
Microsoft proves the announced retirement date and the stated manifest validity and Developer Portal consequences. It does not prove the feature had already retired at the 27 August observation or that every Teams app uses environment variables.
Lifecycle history
Dated event sequence
- Retirement announced
Microsoft announced the retirement of Developer Portal app-manifest environment variables.
- Retirement scheduled
Microsoft states that manifests referencing the retired environment variables become invalid and the Developer Portal variables are no longer accessible.
Evidence ledger
First-party sources
- 01Microsoft — Microsoft Teams developer announcements
Official Microsoft Teams developer documentation · 2026-08-04
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