diff --git a/Workbooks/Virtual Machines/Availability/server availability.workbook b/Workbooks/Virtual Machines/Availability/server availability.workbook
new file mode 100644
index 0000000..fc845c7
--- /dev/null
+++ b/Workbooks/Virtual Machines/Availability/server availability.workbook	
@@ -0,0 +1,258 @@
+{
+  "version": "Notebook/1.0",
+  "items": [
+    {
+      "type": 1,
+      "content": {
+        "json": "# Server Availability\r\n\r\n\r\n<hr>"
+      },
+      "name": "text - 2"
+    },
+    {
+      "type": 9,
+      "content": {
+        "version": "KqlParameterItem/1.0",
+        "crossComponentResources": [
+          "{Subscription}"
+        ],
+        "parameters": [
+          {
+            "id": "ff24505c-2099-43a4-a8a3-3456bed78eb5",
+            "version": "KqlParameterItem/1.0",
+            "name": "TimeRange",
+            "type": 4,
+            "isRequired": true,
+            "value": {
+              "durationMs": 604800000
+            },
+            "typeSettings": {
+              "selectableValues": [
+                {
+                  "durationMs": 3600000
+                },
+                {
+                  "durationMs": 14400000
+                },
+                {
+                  "durationMs": 43200000
+                },
+                {
+                  "durationMs": 86400000
+                },
+                {
+                  "durationMs": 172800000
+                },
+                {
+                  "durationMs": 259200000
+                },
+                {
+                  "durationMs": 604800000
+                },
+                {
+                  "durationMs": 1209600000
+                },
+                {
+                  "durationMs": 2419200000
+                },
+                {
+                  "durationMs": 2592000000
+                },
+                {
+                  "durationMs": 5184000000
+                },
+                {
+                  "durationMs": 7776000000
+                }
+              ]
+            }
+          },
+          {
+            "id": "bfe50469-7469-4c4d-a33e-0edbb43546c4",
+            "version": "KqlParameterItem/1.0",
+            "name": "Subscription",
+            "type": 6,
+            "isRequired": true,
+            "multiSelect": true,
+            "quote": "'",
+            "delimiter": ",",
+            "value": [
+              "/subscriptions/64f9887b-aa93-4bc9-a8d7-56033998b7b1"
+            ],
+            "typeSettings": {
+              "additionalResourceOptions": [
+                "value::all"
+              ],
+              "includeAll": true
+            }
+          },
+          {
+            "id": "fb861784-4609-49f2-9f58-427fcc547677",
+            "version": "KqlParameterItem/1.0",
+            "name": "Workspace",
+            "type": 5,
+            "isRequired": true,
+            "multiSelect": true,
+            "quote": "'",
+            "delimiter": ",",
+            "query": "where type =~ 'microsoft.operationalinsights/workspaces'\r\n| order by name asc\r\n| summarize Selected = makelist(id, 10), All = makelist(id, 1000)\r\n| mvexpand All limit 200\r\n| project value = tostring(All), label = tostring(All), selected = iff(Selected contains All, true, false)",
+            "crossComponentResources": [
+              "{Subscription}"
+            ],
+            "typeSettings": {
+              "resourceTypeFilter": {
+                "microsoft.operationalinsights/workspaces": true
+              },
+              "additionalResourceOptions": [
+                "value::all"
+              ]
+            },
+            "timeContext": {
+              "durationMs": 0
+            },
+            "timeContextFromParameter": "TimeRange",
+            "queryType": 1,
+            "resourceType": "microsoft.resourcegraph/resources"
+          },
+          {
+            "id": "b2627475-cef7-4e91-97b9-b70bf00164e6",
+            "version": "KqlParameterItem/1.0",
+            "name": "Servers",
+            "type": 2,
+            "isRequired": true,
+            "multiSelect": true,
+            "quote": "'",
+            "delimiter": ",",
+            "query": "Heartbeat\r\n| distinct Computer\r\n| order by Computer asc",
+            "crossComponentResources": [
+              "{Workspace}"
+            ],
+            "value": [
+              "adVM.Cloudwise.co.za",
+              "ULabDC.ulab.local"
+            ],
+            "typeSettings": {
+              "additionalResourceOptions": [
+                "value::all"
+              ]
+            },
+            "timeContext": {
+              "durationMs": 0
+            },
+            "timeContextFromParameter": "TimeRange",
+            "queryType": 0,
+            "resourceType": "microsoft.operationalinsights/workspaces"
+          }
+        ],
+        "style": "pills",
+        "queryType": 1,
+        "resourceType": "microsoft.resourcegraph/resources"
+      },
+      "name": "parameters - 1"
+    },
+    {
+      "type": 1,
+      "content": {
+        "json": "### This Workbook calculates availability of VM's based on the specified time period."
+      },
+      "name": "text - 3"
+    },
+    {
+      "type": 3,
+      "content": {
+        "version": "KqlItem/1.0",
+        "query": "let timeRangeStart = {TimeRange:start};\r\nlet timeRangeEnd = {TimeRange:end};\r\nHeartbeat\r\n| where TimeGenerated > timeRangeStart and TimeGenerated < timeRangeEnd and  Computer in ({Servers})\r\n| summarize heartbeat_per_hour=count() by bin_at(TimeGenerated, 1h, timeRangeStart), Computer\r\n| extend available_per_hour=iff(heartbeat_per_hour>0, true, false)\r\n| summarize total_available_hours=countif(available_per_hour==true) by Computer \r\n| extend total_number_of_buckets=round((timeRangeEnd-timeRangeStart)/1h)\r\n| extend availability_rate=total_available_hours*100/total_number_of_buckets\r\n| order by availability_rate asc",
+        "size": 0,
+        "timeContext": {
+          "durationMs": 0
+        },
+        "timeContextFromParameter": "TimeRange",
+        "exportToExcelOptions": "visible",
+        "queryType": 0,
+        "resourceType": "microsoft.operationalinsights/workspaces",
+        "crossComponentResources": [
+          "{Workspace}"
+        ],
+        "gridSettings": {
+          "formatters": [
+            {
+              "columnMatch": "Computer",
+              "formatter": 0,
+              "formatOptions": {
+                "showIcon": true
+              }
+            },
+            {
+              "columnMatch": "total_available_hours",
+              "formatter": 0,
+              "formatOptions": {
+                "showIcon": true
+              }
+            },
+            {
+              "columnMatch": "total_number_of_buckets",
+              "formatter": 0,
+              "formatOptions": {
+                "showIcon": true
+              }
+            },
+            {
+              "columnMatch": "availability_rate",
+              "formatter": 3,
+              "formatOptions": {
+                "min": 0,
+                "max": 100,
+                "palette": "redGreen",
+                "showIcon": true
+              },
+              "numberFormat": {
+                "unit": 1,
+                "options": {
+                  "style": "decimal"
+                }
+              }
+            },
+            {
+              "columnMatch": "number_of_buckets",
+              "formatter": 0,
+              "formatOptions": {
+                "showIcon": true
+              }
+            }
+          ],
+          "sortBy": [
+            {
+              "itemKey": "$gen_bar_availability_rate_3",
+              "sortOrder": 1
+            }
+          ],
+          "labelSettings": [
+            {
+              "columnId": "Computer"
+            },
+            {
+              "columnId": "total_available_hours",
+              "label": "Total Available Hours"
+            },
+            {
+              "columnId": "total_number_of_buckets",
+              "label": "Total Hours"
+            },
+            {
+              "columnId": "availability_rate",
+              "label": "Availability %"
+            }
+          ]
+        },
+        "sortBy": [
+          {
+            "itemKey": "$gen_bar_availability_rate_3",
+            "sortOrder": 1
+          }
+        ]
+      },
+      "name": "query - 0"
+    }
+  ],
+  "styleSettings": {},
+  "$schema": "https://github.com/Microsoft/Application-Insights-Workbooks/blob/master/schema/workbook.json"
+}
\ No newline at end of file
diff --git a/Workbooks/Virtual Machines/Availability/settings.json b/Workbooks/Virtual Machines/Availability/settings.json
new file mode 100644
index 0000000..6f2994e
--- /dev/null
+++ b/Workbooks/Virtual Machines/Availability/settings.json	
@@ -0,0 +1,8 @@
+{
+    "$schema": "https://github.com/Microsoft/Application-Insights-Workbooks/blob/master/schema/settings.json",
+    "name":"Availability",
+    "author": "Microsoft",
+    "galleries": [
+        { "type": "workbook", "resourceType": "Azure Monitor", "categoryKey": "azureMonitorVirtualMachines", "order": 300  }
+    ]
+}
\ No newline at end of file