InstanceProfileArn
From Array Suite Wiki
In ArrayServer/Studio on Cloud configuration, the access/private key either needs to be able to create roles/policies/instance profiles, or the ARN of the instance profile needs to be created by the admin and specified in the ArrayServer.cfg. If ARN was manually created and specified, this ARN will need to be able to access the buckets specified in the ArrayServer.cfg, as well as being able to launch/terminate EC2 instances.
[Cloud] Provider=Amazon Region=us-east-1 AccessKey=xxxxxxxxxxxxxxxxxxx SecretKey=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx UseHttp=False OmicsoftCloudDirectory=s3://east.dev.omicsoft/ArrayServerOmicsoftHome MaxInstanceCount=5 UseReducedRedundancy=False EnableDataEncryption=False InstanceProfileArn=arn:aws:iam::xxxxxxxxxxxxx:instance-profile/project/xxx-xxx-omicsoft-xxxxxxxxxx