hi,Houssem, according your issue, i have some suggest
1. you can reference FusionSphere virtualization Suite 6.3.1 Product Documentation, and the link is :
http://support.huawei.com/hedex/hdx.do?docid=EDOC1100042943&lang=en&idPath=7919749|7919788|9856606|21462752|8576912and in the guide have many FusionManager information
2. you can check FusionSphere 6.3.1 version mapping ,check the compatible FusionManager version.and the version mapping :
https://support.huawei.com/enterprise/en/doc/EDOC1100042886?idPath=7919749|7919788|9856606|21462752|8576912
and according your FusionManager version , you can check FusionManager production documentation .
eg: FusionManager V100R006C00 link :
http://support.huawei.com/hedex/hdx.do?docid=EDOC1000116701&lang=en&idPath=7919749|7919788|9856606|21462752|8576916