You can collect data in custom log formats to Microsoft Sentinel with the Log Analytics agent.
Note: You can use the Log Analytics agent to collect data in text files of nonstandard formats from both Windows and Linux computers. Once collected, you can either parse the data into individual fields in your queries or extract the data during collection to individual fields.
You can connect your data sources to Microsoft Sentinel using custom log formats.
Microsoft Sentinel uses Azure role-based access control (Azure RBAC) to provide built-in roles that can be assigned to users, groups, and services in Azure.
Use Azure RBAC to create and assign roles within your security operations team to grant appropriate access to Microsoft Sentinel. The different roles give you fine-grained control over what Microsoft Sentinel users can see and do. Azure roles can be assigned in the Microsoft Sentinel workspace directly (see note below), or in a subscription or resource group that the workspace belongs to, which Microsoft Sentinel inherits.
Reference:
https://docs.microsoft.com/en-us/azure/azure-monitor/agents/agents-overview
https://docs.microsoft.com/en-us/azure/sentinel/connect-custom-logs?tabs=DCG
https://docs.microsoft.com/en-us/azure/sentinel/roles