statusMap = Map();
if(projectDetails != null && projectDetails.get("projects") != null)
{
projectDetail = projectDetails.get("projects").get(0);
layoutDetails = projectDetail.get("layout_details");
projectLayoutId = layoutDetails.get("project").get("id");
info "projectLayoutId: " + projectLayoutId;
projectLayoutDetail = invokeurl
[
url :projectsAPIEndPoint + "/portal/" + portalId + "/module/projects/layouts/" + projectLayoutId + "/"
type :GET
connection:""
];
info projectLayoutDetail;
info "---------";
if(projectLayoutDetail != null && projectLayoutDetail.get("customstatus"))
{
projectStatus = projectLayoutDetail.get("customstatus");
for each  status in projectStatus
{
statusMap.put(status.get("status_name"),status.get("status_id"));
}
}
info "statusMap : " + statusMap;
info "------------------------";
if(statusMap.containKey(updateStatusName))
{
updateProjectParamMap = Map();
updateProjectParamMap.put("custom_status",statusMap.get(updateStatusName));
projectDetail = invokeurl
[
url :projectsAPIEndPoint + "/portal/" + portalId + "/projects/" + projectId + "/"
type :POST
parameters:updateProjectParamMap
connection:"xxxxxxxxxx"
];
info projectDetail;
info "-------------------------------------";
}
}
}

Make sure to replace "xxxxxxxxxx" in the above code with the connection link name. Screenshot of the list of parameters to be mapped is attached for reference.

With the custom function code provided above, our customer effectively utilised Task custom functions in Zoho Projects which allowed them to automate Project status updates, reducing time consumption and in turn increasing their business productivity.

We hope you found this post useful. If you have any questions or wondering if your requirement could be met using custom functions, feel free to share them in the comments section below.