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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(124.80000000000001, 28.000000000000004%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EI%3C/text%3E%3C/svg%3E)
Hi,
I'm trying to use this API https://learn.microsoft.com/en-us/graph/api/channel-list-members?view=graph-rest-1.0&tabs=http
with authorization code flow
but when trying to add ChannelMember.ReadWrite.All permission I get this error:
what should I do?
if I add only application permission I get this error:
Thanks!
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(112.00000000000001, 24%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. According to your description, your question is related to Teams API development. So I will also add Teams development tag to your thread. Thanks for your understanding!
I don't seem to have any issues adding ChannelMember.ReadWrite.All delegate permissions, perhaps try with a different admin account? Which "flavor" of M365 are you on, is it the global multi-tenant one or Gov/China/something else?
No, I have only one admin, and I’m not using a global, multi-tenant, or Gov/China environment. The error is from the portal, so you should be able to identify the problem.