Hi guys,
we investigated into this issue and we found a solution.

Teams DEM Settings:

[IncludeFolderTrees]
<LocalAppData>\Microsoft\Credentials
<LocalAppData>\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy
<LocalAppData>\Microsoft\IdentityCache
<LocalAppData>\Microsoft\TokenBroker

[IncludeFiles]
<AppData>\Microsoft\Teams\desktop-config.json
<AppData>\Microsoft\Teams\preauth.json
<AppData>\Microsoft\Teams\Preferences
<AppData>\Microsoft\Teams\settings.json
<AppData>\Microsoft\Teams\storage.json

[IncludeRegistryTrees]
HKCU\Software\Microsoft\Office\Teams\
HKCU\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.aad.brokerplugin_cw5n1h2txyewy
HKCU\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\PolicyCache\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy
HKCU\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Repository\Families\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy
HKCU\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\SystemAppData\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy
HKCU\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1910091885-1573563583-1104941280-2418270861-3411158377-2822700936-2990310272
HKCU\Software\Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppModel\Repository\Packages\Microsoft.AAD.BrokerPlugin_1000.18362.449.0_neutral_neutral_cw5n1h2txyewy

[ExcludeFolderTrees]
<LocalAppData>\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\TempState

Shared Settings for O365:

Include the following into IncludeFolderTrees:

<LocalAppData>\Microsoft\Office\16.0\Licensing

With this config it works fine for us

KR
Mathias