Hi @Marek Lani
According to your description of "Error code 43881", this is usually related to verifying payment methods or account information. Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. According to your description, your question is not in our support scope. Thanks for your understanding and patience.
It is recommended that you submit a support request in the billing management of the admin center: https://entra.microsoft.com/#view/Microsoft_AAD_IAM/LicensesMenuBlade/~/supportRequest
Or contact telephone support.
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