diff --git a/plugins/mimecast/.CHECKSUM b/plugins/mimecast/.CHECKSUM
index 56cf132cf0..763a2d92a3 100644
--- a/plugins/mimecast/.CHECKSUM
+++ b/plugins/mimecast/.CHECKSUM
@@ -1,7 +1,7 @@
 {
-	"spec": "b143b1d54f9da70ca370e6411fda8521",
-	"manifest": "6424ea420e9efa1c84e62c188ec5c7a5",
-	"setup": "0341b12a504b4a79cb41be01bf44cc24",
+	"spec": "35db88201d0c437148d3a5851253f0e4",
+	"manifest": "8be151ad8e7d232ce62fded2340d6841",
+	"setup": "e585cdea9a7cf94ca339985c0f2bbc7d",
 	"schemas": [
 		{
 			"identifier": "add_group_member/schema.py",
diff --git a/plugins/mimecast/Dockerfile b/plugins/mimecast/Dockerfile
index 3c18464d5e..3be75d65ef 100755
--- a/plugins/mimecast/Dockerfile
+++ b/plugins/mimecast/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=linux/amd64 rapid7/insightconnect-python-3-slim-plugin:6.1.0
+FROM --platform=linux/amd64 rapid7/insightconnect-python-3-slim-plugin:6.1.2
 
 LABEL organization=rapid7
 LABEL sdk=python
diff --git a/plugins/mimecast/bin/komand_mimecast b/plugins/mimecast/bin/komand_mimecast
index b223b347e3..d96415004a 100755
--- a/plugins/mimecast/bin/komand_mimecast
+++ b/plugins/mimecast/bin/komand_mimecast
@@ -6,7 +6,7 @@ from sys import argv
 
 Name = "Mimecast"
 Vendor = "rapid7"
-Version = "5.3.17"
+Version = "5.3.18"
 Description = "[Mimecast](https://www.mimecast.com) is a set of cloud services designed to provide next generation protection against advanced email-borne threats such as malicious URLs, malware, impersonation attacks, as well as internally generated threats, with a focus on email security. This plugin utilizes the [Mimecast API](https://www.mimecast.com/developer/documentation)"
 
 
diff --git a/plugins/mimecast/help.md b/plugins/mimecast/help.md
index 826e4c6e9d..6512990e23 100644
--- a/plugins/mimecast/help.md
+++ b/plugins/mimecast/help.md
@@ -1014,6 +1014,7 @@ For the Create Managed URL action, the URL must include `http://` or `https://`
 
 # Version History
 
+* 5.3.18 - Fix task connection test | Trim whitespace from connection inputs | bump SDK to version 6.1.2
 * 5.3.17 - Task `monitor_siem_logs` update the mapping used for the USBCOM region
 * 5.3.16 - Task `monitor_siem_logs` Limit the number of events per run to 7500 | bump SDK to version 6.1.0
 * 5.3.15 - Fix snyk vulnerabilities | bump SDK to version 6.0.1 | Allow for the task connection tests to pass back a message along side a status
diff --git a/plugins/mimecast/komand_mimecast/connection/connection.py b/plugins/mimecast/komand_mimecast/connection/connection.py
index 8dd5808962..18866c5727 100755
--- a/plugins/mimecast/komand_mimecast/connection/connection.py
+++ b/plugins/mimecast/komand_mimecast/connection/connection.py
@@ -20,10 +20,10 @@ def __init__(self):
     def connect(self, params={}):
         self.client = MimecastAPI(
             params.get(Input.REGION, DEFAULT_REGION),
-            params.get(Input.ACCESS_KEY).get("secretKey"),
-            params.get(Input.SECRET_KEY).get("secretKey"),
-            params.get(Input.APP_ID),
-            params.get(Input.APP_KEY).get("secretKey"),
+            params.get(Input.ACCESS_KEY, {}).get("secretKey", "").strip(),
+            params.get(Input.SECRET_KEY, {}).get("secretKey", "").strip(),
+            params.get(Input.APP_ID, "").strip(),
+            params.get(Input.APP_KEY, {}).get("secretKey", "").strip(),
             self.logger,
         )
 
@@ -42,7 +42,7 @@ def test(self):
     def test_task(self):
         self.logger.info("Running a connection test to Mimecast")
         try:
-            _, _, _ = self.client.get_siem_logs("")
+            _, _, _, _ = self.client.get_siem_logs("")
             message = "The connection test to Mimecast was successful"
             self.logger.info(message)
             return {"success": True}, message
diff --git a/plugins/mimecast/plugin.spec.yaml b/plugins/mimecast/plugin.spec.yaml
index 77d8c509d8..e6483dfb86 100644
--- a/plugins/mimecast/plugin.spec.yaml
+++ b/plugins/mimecast/plugin.spec.yaml
@@ -17,7 +17,7 @@ links:
  - "[Mimecast](http://mimecast.com)"
 references:
  - "[Mimecast API](https://www.mimecast.com/developer/documentation)"
-version: 5.3.17
+version: 5.3.18
 connection_version: 5
 supported_versions: ["Mimecast API 2024-06-18"]
 vendor: rapid7
@@ -25,7 +25,7 @@ support: rapid7
 cloud_ready: true
 sdk:
   type: slim
-  version: 6.1.0
+  version: 6.1.2
   user: nobody
 status: []
 resources:
@@ -40,6 +40,7 @@ hub_tags:
   keywords: [mimecast, email, cloud_enabled]
   features: []
 version_history:
+- "5.3.18 - Fix task connection test | Trim whitespace from connection inputs | bump SDK to version 6.1.2"
 - "5.3.17 - Task `monitor_siem_logs` update the mapping used for the USBCOM region"
 - "5.3.16 - Task `monitor_siem_logs` Limit the number of events per run to 7500 | bump SDK to version 6.1.0"
 - "5.3.15 - Fix snyk vulnerabilities | bump SDK to version 6.0.1 | Allow for the task connection tests to pass back a message along side a status"
diff --git a/plugins/mimecast/setup.py b/plugins/mimecast/setup.py
index 53ce88dc13..a12925c1fe 100755
--- a/plugins/mimecast/setup.py
+++ b/plugins/mimecast/setup.py
@@ -3,7 +3,7 @@
 
 
 setup(name="mimecast-rapid7-plugin",
-      version="5.3.17",
+      version="5.3.18",
       description="[Mimecast](https://www.mimecast.com) is a set of cloud services designed to provide next generation protection against advanced email-borne threats such as malicious URLs, malware, impersonation attacks, as well as internally generated threats, with a focus on email security. This plugin utilizes the [Mimecast API](https://www.mimecast.com/developer/documentation)",
       author="rapid7",
       author_email="",