SSO and RFC connections: After switching to SSO (Single Sign On) our RFC access to SAP Web Repository no longer works. Secure connections are now mandatory and logon with user name and password is not allowed. What can we do?
GuiXT support SSO in RFC logon as of version 2021 Q1 2. Please see our article

Configuration for SSO and SNC

for the details. 

GuiXT version prior to 2021 Q1 2:

There are SAP profile parameters that allow RFC connections with name and password even when normal logon requires SSO:

snc/accept_insecure_rfc = 1
(accept RFC without SSO)


snc/accept_insecure_rfc  = U
(accept RFC without SSO for specific RFC users)

For details see, for example: